{"id":41122,"date":"2024-11-06T17:21:53","date_gmt":"2024-11-06T09:21:53","guid":{"rendered":"https:\/\/www.wukongsch.com\/blog\/?p=41122"},"modified":"2025-06-13T12:52:31","modified_gmt":"2025-06-13T04:52:31","slug":"what-is-variance","status":"publish","type":"post","link":"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/","title":{"rendered":"\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b"},"content":{"rendered":"<div style=\"margin-top: 0px; margin-bottom: 0px;\" class=\"sharethis-inline-share-buttons\" ><\/div>\n<p>\u65b9\u5dee\u662f\u521d\u4e2d\u6570\u5b66\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u5927\u5c0f\u7684\u6307\u793a\uff0c\u7ecf\u5e38\u88ab\u7528\u6765\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3002\u90a3\u4e48\u4f60\u662f\u5426\u4e86\u89e3\u65b9\u5dee\u5462\uff1f\u5b83\u7684\u8ba1\u7b97\u516c\u5f0f\u53c8\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f\u672c\u6587<a href=\"https:\/\/www.wukongsch.com\/zh\/math\/\">\u609f\u7a7a\u6570\u5b66<\/a>\u5c31\u6765\u8bb2\u89e3\u4e0b\u65b9\u5dee\u662f\u4ec0\u4e48\uff0c\u8ba1\u7b97\u516c\u5f0f\u53ca\u65b9\u5dee\u4e0e\u6807\u51c6\u7684\u5dee\u7684\u533a\u522b\uff0c\u5e26\u4f60\u6df1\u5165\u4e86\u89e3\u521d\u4e2d\u6570\u5b66\u77e5\u8bc6\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"506\" src=\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2025\/11\/image-15-1024x506.png\" alt=\"\" class=\"wp-image-41123\"\/><\/figure>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"630\" height=\"493\" src=\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2025\/11\/image-18.png\" alt=\"\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b\" class=\"wp-image-41125\"\/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e6%96%b9%e5%b7%ae%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f\"><\/span>\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f<\/strong>\u65b9\u5dee\u662f\u6982\u7387\u8bba\u548c\u6570\u7406\u7edf\u8ba1\u4e2d\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u4e3b\u8981\u7528\u6765\u8861\u91cf\u968f\u673a\u53d8\u91cf\u4e0e\u671f\u671b\u503c\u4e4b\u95f4\u7684\u79bb\u6563\u7a0b\u5ea6\u3002\u7b80\u5355\u6765\u8bb2\uff0c\u65b9\u5dee\u63cf\u8ff0\u4e86\u6570\u636e\u70b9\u76f8\u5bf9\u4e8e\u5747\u503c\u7684\u79bb\u6563\u7a0b\u5ea6\uff0c\u5982\u679c\u6570\u636e\u70b9\u90fd\u96c6\u4e2d\u5728\u5747\u503c\u9644\u8fd1\uff0c\u65b9\u5dee\u5c31\u884c\uff0c\u5982\u679c\u6570\u636e\u70b9\u5206\u6563\u5728\u5747\u503c\u4e24\u4fa7\uff0c\u65b9\u5dee\u8f83\u5927\u3002\u65b9\u5dee\u5728\u7edf\u8ba1\u5b66\u3001\u91d1\u878d\u3001\u5de5\u7a0b\u7b49\u9886\u57df\u5177\u6709\u5e7f\u6cdb\u5e94\u7528\u4ef7\u503c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e6%96%b9%e5%b7%ae%e7%9a%84%e8%ae%a1%e7%ae%97%e5%85%ac%e5%bc%8f\"><\/span>\u65b9\u5dee\u7684\u8ba1\u7b97\u516c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>\u65b9\u5dee\u7684\u610f\u4e49<\/strong>\u5728\u4e8e\u53ef\u4ee5\u76f4\u89c2\u7684\u53cd\u6620\u51fa\u6570\u636e\u7684\u5206\u5e03\u60c5\u51b5\uff0c\u8fd9\u5bf9\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3001\u6ce2\u52a8\u6027\u7b49\u65b9\u9762\u975e\u5e38\u6709\u5e2e\u52a9\u3002\u6bd4\u5982\u5728\u6295\u8d44\u3001\u4fdd\u9669\u7b49\u9886\u57df\uff0c\u65b9\u5dee\u5e38\u88ab\u7528\u6765\u8bc4\u4f30\u98ce\u9669\u3002\u65b9\u5dee\u8d8a\u5927\uff0c\u8868\u793a\u6295\u8d44\u98ce\u9669\u8d8a\u9ad8\uff1b\u65b9\u5dee\u8d8a\u5c0f\uff0c\u8868\u793a\u98ce\u9669\u6295\u8d44\u8d8a\u4f4e\u3002\u901a\u8fc7\u5bf9\u65b9\u5dee\u7684\u5206\u6790\uff0c\u6295\u8d44\u8005\u53ef\u4ee5\u5236\u5b9a\u66f4\u52a0\u5408\u7406\u7684\u6295\u8d44\u7b56\u7565\uff0c\u964d\u4f4e\u6295\u8d44\u98ce\u9669\u3002<\/p>\n<div class=\"retention-card-new\" data-lang=\"zh\" data-subject=\"MATH\" data-btnName=\"\u7acb\u5373\u514d\u8d39\u8bd5\u542c\" data-subTitle=\"\u9002\u5408\u5168\u74031-12\u5e74\u7ea7\u5b66\u751f\">\r\n    <div class=\"retention-card-l\">\r\n        <div class=\"trustpilot-image\"><\/div>\r\n        <h3><p>\u609f\u7a7a\u56fd\u9645\u6570\u5b66<br \/>\n<span>\u8ba9\u6570\u5b66\u4e4b\u5149\u7167\u4eae\u6bcf\u4e00\u4e2a\u5b69\u5b50\uff01<\/span><\/p>\n<\/h3>\r\n        <p>\u9002\u5408\u5168\u74031-12\u5e74\u7ea7\u5b66\u751f<\/p>\r\n        <a class=\"retention-card-button is-point\" href=\"https:\/\/www.wukongsch.com\/zh\/independent-appointment\/?subject=math&amp;l=c87d1e8c-ec8e-4a2a-83b7-84e0af53d81f&amp;booking_triggerevent=BLOG_DETAIL_MODEL_CTA_BUTTON\" data-buttonname=\"\u7acb\u5373\u9884\u7ea6\u6309\u94ae\u70b9\u51fb\" data-event=\"C_Blog_BLOG_DETAIL_MIDDLE_CTA_BUTTON\" data-expose-buttonname=\"\u7acb\u5373\u9884\u7ea6\u6309\u94ae\u66dd\u5149\" data-expose-event=\"D_Blog_BLOG_DETAIL_MIDDLE_CTA_BUTTON\" target=\"_blank\" title=\"\u7acb\u5373\u514d\u8d39\u8bd5\u542c\">\r\n            \u7acb\u5373\u514d\u8d39\u8bd5\u542c\r\n        <\/a>\r\n    <\/div>\r\n    <div class=\"retention-card-r\"><\/div>\r\n<\/div>\n\n\n<p>\u5728\u521d\u4e2d\u6570\u5b66\u4e2d\uff0c\u65b9\u5dee\u7684\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p>\u65b9\u5dee= \u03a3(xi &#8211; \u03bc)\u00b2 \/ N<\/p>\n\n\n\n<p>\u5176\u4e2dN\u662f\u6570\u636e\u70b9\u7684\u4e2a\u6570\uff0c\u03bc\u662f\u8be5\u7ec4\u6570\u636e\u7684\u5e73\u5747\u503c\uff0cxi \u662f\u6bcf\u4e2a\u6570\u636e\u70b9\uff0c\u03a3\u8868\u793a\u6c42\u548c\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img decoding=\"async\" width=\"576\" height=\"311\" src=\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2025\/11\/image-17.png\" alt=\"\u65b9\u5dee\u7684\u8ba1\u7b97\u516c\u5f0f\" class=\"wp-image-41126\" style=\"width:828px;height:auto\"\/><\/figure><\/div>\n\n\n<p>\u65b9\u5dee\u516c\u5f0f\u7684\u5177\u4f53\u8ba1\u7b97\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"1\">\n<li>\u6c42\u51fa\u6570\u636e\u7684\u5e73\u5747\u503c\u03bc\u3002<\/li>\n\n\n\n<li>\u5bf9\u4e8e\u6bcf\u4e2a\u6570\u636e\u70b9xi\uff0c\u8ba1\u7b97\u5176\u4e0e\u5e73\u5747\u503c\u03bc\u7684\u5dee\u503c\uff08xi-\u03bc\uff09\u3002<\/li>\n\n\n\n<li>\u5c06\u4e0a\u8ff0\u5dee\u503c\u5e73\u65b9\uff0c\u5f97\u51fa\uff08xi-\u03bc\uff09\u00b2\u3002<\/li>\n\n\n\n<li>\u5c06\u6240\u6709\u6570\u636e\u70b9\u7684\u5e73\u65b9\u5dee\u503c\u6c42\u548c\uff0c\u5f97\u51fa\u03a3\uff08xi-\u03bc\uff09\u00b2\u3002<\/li>\n\n\n\n<li>\u5c06\u6c42\u548c\u7ed3\u679c\u9664\u4ee5\u6570\u636e\u70b9\u7684\u8fd9\u4e2aN\uff0c\u5373\u53ef\u5f97\u51fa\u65b9\u5dee\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u4f8b\u5982\uff1a\u6211\u4eec\u6709\u4e00\u4e2a\u6570\u636e\u96c6\u4e3a\uff1a2,4,4,4, 5, 5, 7, 9\u3002\u6839\u636e\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u8ba1\u7b97\u51fa\u8fd9\u4e2a\u6570\u636e\u96c6\u7684\u65b9\u5dee\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"1\">\n<li>\u6c42\u51fa\u6570\u636e\u7684\u5e73\u5747\u503c\u03bc\uff1a\u6570\u636e\u96c6\u7684\u603b\u548c\u662f2+4+4+4+5+5+7+9=35\u3002\u6570\u636e\u70b9\u7684\u6570\u91cf\u662fN=8\u3002\u56e0\u6b64\uff0c\u5e73\u5747\u503c\u03bc=35\/8=4.375\u3002<\/li>\n\n\n\n<li>\u8ba1\u7b97\u6bcf\u4e2a\u6570\u636e\u70b9\u4e0e\u5e73\u5747\u503c\u7684\u5dee\u503c\uff08xi-\u03bc\uff09\uff1a\u7b2c\u4e00\u4e2a\u6570\u636e\u70b92\u548c\u5e73\u5747\u503c\u7684\u5dee\u503c\u4e3a2-4.375=-2.375\uff0c\u901a\u8fc7\u4e3a\u6bcf\u4e00\u4e2a\u6570\u636e\u70b9\u8ba1\u7b97\uff0c\u5373\u53ef\u5f97\u51fa\u4e00\u7ec4\u5dee\u503c\u3002<\/li>\n\n\n\n<li>\u5c06\u5dee\u503c\u5e73\u65b9\uff1a\u5c31\u4e0a\u4e00\u6b65\u5f97\u5230\u7684\u5dee\u503c\u5e73\u65b9\uff0c\u4f8b\u5982-2.375\u7684\u5e73\u65b9\u662f\uff08-2.375\uff09\u00b2=5.640625\u3002\u5229\u7528\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5bf9\u6240\u6709\u7684\u5dee\u503c\u5e73\u65b9\u3002<\/li>\n\n\n\n<li>\u5c06\u6240\u6709\u6570\u636e\u70b9\u6c42\u548c\uff1a\u5c06\u6240\u6709\u7684\u5dee\u503c\u5e73\u65b9\u540e\uff0c\u518d\u5c06\u5176\u52a0\u8d77\u6765\uff0c\u6bd4\u5982\u6211\u4eec\u6709\u4e24\u4e2a\u5e73\u65b9\u5dee\u503c\u4e3a 5.640625 \u548c 0.78125\uff0c\u5219\u6c42\u548c\u662f 5.640625 + 0.78125 = 6.421875\u3002 \u5229\u7528\u8fd9\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9\u6240\u6709\u5e73\u65b9\u5dee\u503c\u8fdb\u884c\u6c42\u548c\u3002<\/li>\n\n\n\n<li>\u5c06\u6c42\u548c\u7ed3\u679c\u9664\u4ee5\u6570\u636e\u70b9\u7684\u6570\u91cfN\uff1a\u5982\u679c\u6211\u4eec\u4e0a\u4e00\u6b65\u7684\u5e73\u65b9\u5dee\u6c42\u548c\u7ed3\u679c\u4e3a6.421875\uff0c\u90a3\u4e48\u65b9\u5dee\u5c31\u662f6.421875\/8=0.802734375\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%e6%96%b9%e5%b7%ae%e4%b8%8e%e6%a0%87%e5%87%86%e5%b7%ae%e5%8c%ba%e5%88%ab\"><\/span>\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u5728\u7edf\u8ba1\u5b66\u4e2d\uff0c\u65b9\u5dee\u548c\u6807\u51c6\u5dee\u662f\u4e24\u4e2a\u5e38\u7528\u7684\u6982\u5ff5\uff0c\u867d\u8bf4\u90fd\u662f\u7528\u6765\u8861\u91cf\u4e00\u7ec4\u6570\u636e\u7684\u674e\u73ca\u6210\u90fd\uff0c\u672c\u8d28\u4e0a\u90fd\u662f\u63cf\u8ff0\u6570\u636e\u7684\u6ce2\u52a8\u60c5\u51b5\uff0c\u4f46\u5728\u8ba1\u7b97\u65b9\u6cd5\u548c\u5e94\u7528\u573a\u666f\u65b9\u9762\u7684\u533a\u522b\u8fd8\u662f\u86ee\u5927\u7684\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<p>\u65b9\u5dee\u5206\u6790\uff1a\u65b9\u5dee\u662f\u8861\u91cf\u4e00\u4e2a\u6570\u636e\u4e0e\u5e73\u5747\u503c\u4e4b\u95f4\u5dee\u5f02\u7a0b\u5ea6\u7684\u4e00\u4e2a\u6570\u503c\u3002\u7b80\u5355\u6765\u8bb2\uff0c\u65b9\u5dee\u5c31\u662f\u6bcf\u4e2a\u6570\u5b57\u4e0e\u5e73\u5747\u6570\u4e4b\u5dee\u7684\u5e73\u65b9\u7684\u5e73\u5747\u503c\u3002<\/p>\n\n\n\n<p>\u6807\u51c6\u5dee\u5206\u6790\uff1a\u6807\u51c6\u5dee\u662f\u65b9\u5dee\u7684\u5e73\u65b9\u6839\uff0c\u5b83\u8868\u793a\u6570\u636e\u4e0e\u5176\u5e73\u5747\u6570\u4e4b\u5dee\u7684\u5e73\u5747\u6ce2\u52a8\u5927\u5c0f\u3002\u4e0e\u65b9\u5dee\u76f8\u6bd4\uff0c\u6807\u51c6\u5dee\u7684\u5355\u4f4d\u4e0e\u539f\u59cb\u6570\u636e\u4e00\u81f4\uff0c\u56e0\u6b64\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u66f4\u4e3a\u76f4\u89c2\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"809\" height=\"360\" src=\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2025\/11\/image-16.png\" alt=\"\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b\" class=\"wp-image-41124\"\/><\/figure><\/div>\n\n\n<p>\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u6709\u4ee5\u4e0b\u533a\u522b\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"1\">\n<li>\u8ba1\u7b97\u65b9\u5f0f\uff1a\u65b9\u5dee\u662f\u6570\u636e\u4e0e\u5176\u5e73\u5747\u6570\u4e4b\u5dee\u7684\u5e73\u65b9\u7684\u5e73\u5747\u6570\uff0c\u800c\u6807\u51c6\u5dee\u5219\u662f\u65b9\u5dee\u7684\u5e73\u65b9\u6839\u3002\u8fd9\u4e5f\u610f\u5473\u7740\u65b9\u5dee\u603b\u662f\u975e\u8d1f\u7684\uff0c\u800c\u6807\u51c6\u5dee\u53ef\u4ee5\u662f\u6b63\u6570\u62160\u3002<\/li>\n\n\n\n<li>\u5355\u4f4d\u4e0e\u53ef\u8bfb\u6027\uff1a\u65b9\u5dee\u7684\u5355\u4f4d\u662f\u539f\u59cb\u6570\u636e\u5355\u4f4d\u7684\u5e73\u65b9\uff0c\u800c\u6807\u51c6\u5dee\u7684\u5355\u4f4d\u4e0e\u539f\u59cb\u6570\u636e\u76f8\u540c\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u6807\u51c6\u5dee\u5f80\u5f80\u66f4\u6613\u4e8e\u7406\u89e3\u548c\u89e3\u91ca\u3002<\/li>\n\n\n\n<li>\u5e94\u7528\u573a\u666f\uff1a\u7531\u4e8e\u65b9\u5dee\u6807\u51c6\u5dee\u5728\u91cf\u7eb2\u4e0a\u5b58\u5728\u5dee\u5f02\uff0c\u56e0\u6b64\u5b83\u4eec\u5728\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u4e2d\u5404\u6709\u4f18\u52bf\u3002\u6bd4\u5982\u5728\u9700\u8981\u6bd4\u8f83\u4e0d\u540c\u91cf\u7eb2\u7684\u6570\u636e\u96c6\u65f6\uff0c\u901a\u5e38\u4f1a\u4f7f\u7528\u6807\u51c6\u5dee\uff1b\u800c\u5728\u4e00\u4e9b\u6570\u636e\u63a8\u5bfc\u548c\u8ba1\u7b97\u4e2d\uff0c\u65b9\u5dee\u66f4\u4e3a\u65b9\u4fbf\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u7b80\u5355\u6765\u8bf4\uff0c\u65b9\u5dee\u548c\u6807\u51c6\u5dee\u90fd\u662f\u7528\u6765\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u6027\u7684\u5de5\u5177\uff0c\u4f46\u65b9\u5dee\u8861\u91cf\u7684\u662f\u6ce2\u52a8\u6027\u5927\u5c0f\uff0c\u800c\u6807\u51c6\u5dee\u8861\u91cf\u7684\u662f\u6ce2\u52a8\u6027\u7684\u76f8\u5bf9\u5927\u5c0f\u3002\u5404\u4f4d\u6d77\u5916\u5bb6\u957f\u60f3\u8981\u5b69\u5b50\u4e86\u89e3\u66f4\u591a\u65b9\u5dee\u76f8\u5173\u7684\u6570\u5b66\u77e5\u8bc6\u4e48\uff0c\u5feb\u6765\u514d\u8d39\u9886\u53d6\u609f\u7a7a\u6570\u5b66\u5728\u7ebf\u6570\u5b66\u8bfe\u7a0b\u5427\u3002<\/p>\n\n\n<div class=\"retention-card-new\" data-lang=\"zh\" data-subject=\"MATH\" data-btnName=\"\u7acb\u5373\u514d\u8d39\u8bd5\u542c\" data-subTitle=\"\u9002\u5408\u5168\u74031-12\u5e74\u7ea7\u5b66\u751f\">\r\n    <div class=\"retention-card-l\">\r\n        <div class=\"trustpilot-image\"><\/div>\r\n        <h3><p>\u609f\u7a7a\u56fd\u9645\u6570\u5b66<br \/>\n<span>\u8ba9\u6570\u5b66\u4e4b\u5149\u7167\u4eae\u6bcf\u4e00\u4e2a\u5b69\u5b50\uff01<\/span><\/p>\n<\/h3>\r\n        <p>\u9002\u5408\u5168\u74031-12\u5e74\u7ea7\u5b66\u751f<\/p>\r\n        <a class=\"retention-card-button is-point\" href=\"https:\/\/www.wukongsch.com\/zh\/independent-appointment\/?subject=math&amp;l=c87d1e8c-ec8e-4a2a-83b7-84e0af53d81f&amp;booking_triggerevent=BLOG_DETAIL_MODEL_CTA_BUTTON\" data-buttonname=\"\u7acb\u5373\u9884\u7ea6\u6309\u94ae\u70b9\u51fb\" data-event=\"C_Blog_BLOG_DETAIL_MIDDLE_CTA_BUTTON\" data-expose-buttonname=\"\u7acb\u5373\u9884\u7ea6\u6309\u94ae\u66dd\u5149\" data-expose-event=\"D_Blog_BLOG_DETAIL_MIDDLE_CTA_BUTTON\" target=\"_blank\" title=\"\u7acb\u5373\u514d\u8d39\u8bd5\u542c\">\r\n            \u7acb\u5373\u514d\u8d39\u8bd5\u542c\r\n        <\/a>\r\n    <\/div>\r\n    <div class=\"retention-card-r\"><\/div>\r\n<\/div>","protected":false},"excerpt":{"rendered":"<p>\u65b9\u5dee\u662f\u521d\u4e2d\u6570\u5b66\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u5927\u5c0f\u7684\u6307\u793a\uff0c\u7ecf\u5e38\u88ab\u7528\u6765\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3002\u90a3\u4e48\u4f60\u662f\u5426\u4e86\u89e3\u65b9\u5dee\u5462\uff1f\u5b83\u7684\u8ba1\u7b97\u516c\u5f0f\u53c8\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f\u672c\u6587\u609f\u7a7a\u6570\u5b66\u5c31\u6765\u8bb2\u89e3\u4e0b\u65b9\u5dee\u662f\u4ec0\u4e48\uff0c\u8ba1\u7b97\u516c\u5f0f\u53ca\u65b9\u5dee\u4e0e\u6807\u51c6\u7684\u5dee\u7684\u533a\u522b\uff0c\u5e26\u4f60\u6df1\u5165\u4e86\u89e3\u521d\u4e2d\u6570\u5b66\u77e5\u8bc6\u3002 \u65b9\u5dee\u662f\u4ec0\u4e48\uff1f \u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u65b9\u5dee\u662f\u6982\u7387\u8bba\u548c\u6570\u7406\u7edf\u8ba1\u4e2d\u7684\u91cd\u8981\u6982\u5ff5\uff0c\u4e3b\u8981\u7528\u6765\u8861\u91cf\u968f\u673a\u53d8\u91cf\u4e0e\u671f\u671b\u503c\u4e4b\u95f4\u7684\u79bb\u6563\u7a0b\u5ea6\u3002\u7b80\u5355\u6765\u8bb2\uff0c\u65b9\u5dee\u63cf\u8ff0\u4e86\u6570\u636e\u70b9\u76f8\u5bf9\u4e8e\u5747\u503c\u7684\u79bb\u6563\u7a0b\u5ea6\uff0c\u5982\u679c\u6570\u636e\u70b9\u90fd\u96c6\u4e2d\u5728\u5747\u503c\u9644\u8fd1\uff0c\u65b9\u5dee\u5c31\u884c\uff0c\u5982\u679c\u6570\u636e\u70b9\u5206\u6563\u5728\u5747\u503c\u4e24\u4fa7\uff0c\u65b9\u5dee\u8f83\u5927\u3002\u65b9\u5dee\u5728\u7edf\u8ba1\u5b66\u3001\u91d1\u878d\u3001\u5de5\u7a0b\u7b49\u9886\u57df\u5177\u6709\u5e7f\u6cdb\u5e94\u7528\u4ef7\u503c\u3002 \u65b9\u5dee\u7684\u8ba1\u7b97\u516c\u5f0f \u65b9\u5dee\u7684\u610f\u4e49\u5728\u4e8e\u53ef\u4ee5\u76f4\u89c2\u7684\u53cd\u6620\u51fa\u6570\u636e\u7684\u5206\u5e03\u60c5\u51b5\uff0c\u8fd9\u5bf9\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3001\u6ce2\u52a8\u6027\u7b49\u65b9\u9762\u975e\u5e38\u6709\u5e2e\u52a9\u3002\u6bd4\u5982\u5728\u6295\u8d44\u3001\u4fdd\u9669\u7b49\u9886\u57df\uff0c\u65b9\u5dee\u5e38\u88ab\u7528\u6765\u8bc4\u4f30\u98ce\u9669\u3002\u65b9\u5dee\u8d8a\u5927\uff0c\u8868\u793a\u6295\u8d44\u98ce\u9669\u8d8a\u9ad8\uff1b\u65b9\u5dee\u8d8a\u5c0f\uff0c\u8868\u793a\u98ce\u9669\u6295\u8d44\u8d8a\u4f4e\u3002\u901a\u8fc7\u5bf9\u65b9\u5dee\u7684\u5206\u6790\uff0c\u6295\u8d44\u8005\u53ef\u4ee5\u5236\u5b9a\u66f4\u52a0\u5408\u7406\u7684\u6295\u8d44\u7b56\u7565\uff0c\u964d\u4f4e\u6295\u8d44\u98ce\u9669\u3002 \u5728\u521d\u4e2d\u6570\u5b66\u4e2d\uff0c\u65b9\u5dee\u7684\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a \u65b9\u5dee= \u03a3(xi &#8211; \u03bc)\u00b2 \/ N \u5176\u4e2dN\u662f\u6570\u636e\u70b9\u7684\u4e2a\u6570\uff0c\u03bc\u662f\u8be5\u7ec4\u6570\u636e\u7684\u5e73\u5747\u503c\uff0cxi \u662f\u6bcf\u4e2a\u6570\u636e\u70b9\uff0c\u03a3\u8868\u793a\u6c42\u548c\u3002 \u65b9\u5dee\u516c\u5f0f\u7684\u5177\u4f53\u8ba1\u7b97\u6b65\u9aa4\u5982\u4e0b\uff1a \u4f8b\u5982\uff1a\u6211\u4eec\u6709\u4e00\u4e2a\u6570\u636e\u96c6\u4e3a\uff1a2,4,4,4, 5, 5, 7, 9\u3002\u6839\u636e\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u8ba1\u7b97\u51fa\u8fd9\u4e2a\u6570\u636e\u96c6\u7684\u65b9\u5dee\u3002 \u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b \u5728\u7edf\u8ba1\u5b66\u4e2d\uff0c\u65b9\u5dee\u548c\u6807\u51c6\u5dee\u662f\u4e24\u4e2a\u5e38\u7528\u7684\u6982\u5ff5\uff0c\u867d\u8bf4\u90fd\u662f\u7528\u6765\u8861\u91cf\u4e00\u7ec4\u6570\u636e\u7684\u674e\u73ca\u6210\u90fd\uff0c\u672c\u8d28\u4e0a\u90fd\u662f\u63cf\u8ff0\u6570\u636e\u7684\u6ce2\u52a8\u60c5\u51b5\uff0c\u4f46\u5728\u8ba1\u7b97\u65b9\u6cd5\u548c\u5e94\u7528\u573a\u666f\u65b9\u9762\u7684\u533a\u522b\u8fd8\u662f\u86ee\u5927\u7684\u3002\u6bd4\u5982\uff1a \u65b9\u5dee\u5206\u6790\uff1a\u65b9\u5dee\u662f\u8861\u91cf\u4e00\u4e2a\u6570\u636e\u4e0e\u5e73\u5747\u503c\u4e4b\u95f4\u5dee\u5f02\u7a0b\u5ea6\u7684\u4e00\u4e2a\u6570\u503c\u3002\u7b80\u5355\u6765\u8bb2\uff0c\u65b9\u5dee\u5c31\u662f\u6bcf\u4e2a\u6570\u5b57\u4e0e\u5e73\u5747\u6570\u4e4b\u5dee\u7684\u5e73\u65b9\u7684\u5e73\u5747\u503c\u3002 \u6807\u51c6\u5dee\u5206\u6790\uff1a\u6807\u51c6\u5dee\u662f\u65b9\u5dee\u7684\u5e73\u65b9\u6839\uff0c\u5b83\u8868\u793a\u6570\u636e\u4e0e\u5176\u5e73\u5747\u6570\u4e4b\u5dee\u7684\u5e73\u5747\u6ce2\u52a8\u5927\u5c0f\u3002\u4e0e\u65b9\u5dee\u76f8\u6bd4\uff0c\u6807\u51c6\u5dee\u7684\u5355\u4f4d\u4e0e\u539f\u59cb\u6570\u636e\u4e00\u81f4\uff0c\u56e0\u6b64\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u66f4\u4e3a\u76f4\u89c2\u3002 \u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u6709\u4ee5\u4e0b\u533a\u522b\uff1a \u7b80\u5355\u6765\u8bf4\uff0c\u65b9\u5dee\u548c\u6807\u51c6\u5dee\u90fd\u662f\u7528\u6765\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u6027\u7684\u5de5\u5177\uff0c\u4f46\u65b9\u5dee\u8861\u91cf\u7684\u662f\u6ce2\u52a8\u6027\u5927\u5c0f\uff0c\u800c\u6807\u51c6\u5dee\u8861\u91cf\u7684\u662f\u6ce2\u52a8\u6027\u7684\u76f8\u5bf9\u5927\u5c0f\u3002\u5404\u4f4d\u6d77\u5916\u5bb6\u957f\u60f3\u8981\u5b69\u5b50\u4e86\u89e3\u66f4\u591a\u65b9\u5dee\u76f8\u5173\u7684\u6570\u5b66\u77e5\u8bc6\u4e48\uff0c\u5feb\u6765\u514d\u8d39\u9886\u53d6\u609f\u7a7a\u6570\u5b66\u5728\u7ebf\u6570\u5b66\u8bfe\u7a0b\u5427\u3002<\/p>\n","protected":false},"author":211806819,"featured_media":41123,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[132672],"tags":[],"class_list":["post-41122","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-math-learning-zh"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b - WuKong Edu Blog<\/title>\n<meta name=\"description\" content=\"\u65b9\u5dee\u662f\u521d\u4e2d\u6570\u5b66\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u5927\u5c0f\u7684\u6307\u793a\uff0c\u7ecf\u5e38\u88ab\u7528\u6765\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3002\u90a3\u4e48\u4f60\u662f\u5426\u4e86\u89e3\u65b9\u5dee\u5462\uff1f\u5b83\u7684\u8ba1\u7b97\u516c\u5f0f\u53c8\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f\u672c\u6587\u609f\u7a7a\u6570\u5b66\u5c31\u6765\u8bb2\u89e3\u4e0b\u65b9\u5dee\u662f\u4ec0\u4e48\uff0c\u8ba1\u7b97\u516c\u5f0f\u53ca\u65b9\u5dee\u4e0e\u6807\u51c6\u7684\u5dee\u7684\u533a\u522b\uff0c\u5e26\u4f60\u6df1\u5165\u4e86\u89e3\u521d\u4e2d\u6570\u5b66\u77e5\u8bc6\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b - WuKong Edu Blog\" \/>\n<meta property=\"og:description\" content=\"\u65b9\u5dee\u662f\u521d\u4e2d\u6570\u5b66\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u5927\u5c0f\u7684\u6307\u793a\uff0c\u7ecf\u5e38\u88ab\u7528\u6765\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3002\u90a3\u4e48\u4f60\u662f\u5426\u4e86\u89e3\u65b9\u5dee\u5462\uff1f\u5b83\u7684\u8ba1\u7b97\u516c\u5f0f\u53c8\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f\u672c\u6587\u609f\u7a7a\u6570\u5b66\u5c31\u6765\u8bb2\u89e3\u4e0b\u65b9\u5dee\u662f\u4ec0\u4e48\uff0c\u8ba1\u7b97\u516c\u5f0f\u53ca\u65b9\u5dee\u4e0e\u6807\u51c6\u7684\u5dee\u7684\u533a\u522b\uff0c\u5e26\u4f60\u6df1\u5165\u4e86\u89e3\u521d\u4e2d\u6570\u5b66\u77e5\u8bc6\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/\" \/>\n<meta property=\"og:site_name\" content=\"WuKong Edu Blog\" \/>\n<meta property=\"article:published_time\" content=\"2024-11-06T09:21:53+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-13T04:52:31+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2024\/11\/image-15.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1026\" \/>\n\t<meta property=\"og:image:height\" content=\"507\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Delvair | WuKong Math Teacher\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Delvair | WuKong Math Teacher\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/\",\"url\":\"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/\",\"name\":\"\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b - WuKong Edu Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.wukongsch.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2024\/11\/image-15.png\",\"datePublished\":\"2024-11-06T09:21:53+00:00\",\"dateModified\":\"2025-06-13T04:52:31+00:00\",\"author\":{\"@id\":\"https:\/\/www.wukongsch.com\/blog\/#\/schema\/person\/bbaca7aa958fcf6e4f8dd460901232b4\"},\"description\":\"\u65b9\u5dee\u662f\u521d\u4e2d\u6570\u5b66\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u5927\u5c0f\u7684\u6307\u793a\uff0c\u7ecf\u5e38\u88ab\u7528\u6765\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3002\u90a3\u4e48\u4f60\u662f\u5426\u4e86\u89e3\u65b9\u5dee\u5462\uff1f\u5b83\u7684\u8ba1\u7b97\u516c\u5f0f\u53c8\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f\u672c\u6587\u609f\u7a7a\u6570\u5b66\u5c31\u6765\u8bb2\u89e3\u4e0b\u65b9\u5dee\u662f\u4ec0\u4e48\uff0c\u8ba1\u7b97\u516c\u5f0f\u53ca\u65b9\u5dee\u4e0e\u6807\u51c6\u7684\u5dee\u7684\u533a\u522b\uff0c\u5e26\u4f60\u6df1\u5165\u4e86\u89e3\u521d\u4e2d\u6570\u5b66\u77e5\u8bc6\u3002\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/#primaryimage\",\"url\":\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2024\/11\/image-15.png\",\"contentUrl\":\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2024\/11\/image-15.png\",\"width\":1026,\"height\":507,\"caption\":\"\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wukongsch.com\/blog\/#website\",\"url\":\"https:\/\/www.wukongsch.com\/blog\/\",\"name\":\"WuKong Edu Blog\",\"description\":\"Get latest news of WuKong Education and Tips of WuKong Chinese, Math &amp; English ELA. We also share useful tips for Chinese learning &amp; International Math &amp; English reading, writing learning for 3-18 students.\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wukongsch.com\/blog\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wukongsch.com\/blog\/#\/schema\/person\/bbaca7aa958fcf6e4f8dd460901232b4\",\"name\":\"Delvair | WuKong Math Teacher\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.wukongsch.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/litespeed\/avatar\/38501335435885934b278b7d6a8ed949.jpg?ver=1776938408\",\"contentUrl\":\"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/litespeed\/avatar\/38501335435885934b278b7d6a8ed949.jpg?ver=1776938408\",\"caption\":\"Delvair | WuKong Math Teacher\"},\"description\":\"Delvair, a graduate of the Federal University of Maranh\u00e3o in Brazil, is a dedicated educator with over six years of experience in school-based mathematics instruction. She specializes in advanced math pedagogy, with a particular expertise in Math Kangaroo competition coaching. Driven by the belief that education is the bedrock of a thriving society, Delvair is committed to creating an empowering environment where every child can excel. She holds the firm conviction that with the right guidance, every student possesses the potential to master complex mathematical concepts.\",\"sameAs\":[\"https:\/\/www.wukongsch.com\/blog\/author\/delvair\/\",\"https:\/\/www.linkedin.com\/in\/delvairdiniz\"],\"url\":\"https:\/\/www.wukongsch.com\/blog\/author\/delvair\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b - WuKong Edu Blog","description":"\u65b9\u5dee\u662f\u521d\u4e2d\u6570\u5b66\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u5927\u5c0f\u7684\u6307\u793a\uff0c\u7ecf\u5e38\u88ab\u7528\u6765\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3002\u90a3\u4e48\u4f60\u662f\u5426\u4e86\u89e3\u65b9\u5dee\u5462\uff1f\u5b83\u7684\u8ba1\u7b97\u516c\u5f0f\u53c8\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f\u672c\u6587\u609f\u7a7a\u6570\u5b66\u5c31\u6765\u8bb2\u89e3\u4e0b\u65b9\u5dee\u662f\u4ec0\u4e48\uff0c\u8ba1\u7b97\u516c\u5f0f\u53ca\u65b9\u5dee\u4e0e\u6807\u51c6\u7684\u5dee\u7684\u533a\u522b\uff0c\u5e26\u4f60\u6df1\u5165\u4e86\u89e3\u521d\u4e2d\u6570\u5b66\u77e5\u8bc6\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"en_US","og_type":"article","og_title":"\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b - WuKong Edu Blog","og_description":"\u65b9\u5dee\u662f\u521d\u4e2d\u6570\u5b66\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u5927\u5c0f\u7684\u6307\u793a\uff0c\u7ecf\u5e38\u88ab\u7528\u6765\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3002\u90a3\u4e48\u4f60\u662f\u5426\u4e86\u89e3\u65b9\u5dee\u5462\uff1f\u5b83\u7684\u8ba1\u7b97\u516c\u5f0f\u53c8\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f\u672c\u6587\u609f\u7a7a\u6570\u5b66\u5c31\u6765\u8bb2\u89e3\u4e0b\u65b9\u5dee\u662f\u4ec0\u4e48\uff0c\u8ba1\u7b97\u516c\u5f0f\u53ca\u65b9\u5dee\u4e0e\u6807\u51c6\u7684\u5dee\u7684\u533a\u522b\uff0c\u5e26\u4f60\u6df1\u5165\u4e86\u89e3\u521d\u4e2d\u6570\u5b66\u77e5\u8bc6\u3002","og_url":"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/","og_site_name":"WuKong Edu Blog","article_published_time":"2024-11-06T09:21:53+00:00","article_modified_time":"2025-06-13T04:52:31+00:00","og_image":[{"width":1026,"height":507,"url":"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2024\/11\/image-15.png","type":"image\/png"}],"author":"Delvair | WuKong Math Teacher","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Delvair | WuKong Math Teacher","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/","url":"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/","name":"\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b - WuKong Edu Blog","isPartOf":{"@id":"https:\/\/www.wukongsch.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/#primaryimage"},"image":{"@id":"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/#primaryimage"},"thumbnailUrl":"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2024\/11\/image-15.png","datePublished":"2024-11-06T09:21:53+00:00","dateModified":"2025-06-13T04:52:31+00:00","author":{"@id":"https:\/\/www.wukongsch.com\/blog\/#\/schema\/person\/bbaca7aa958fcf6e4f8dd460901232b4"},"description":"\u65b9\u5dee\u662f\u521d\u4e2d\u6570\u5b66\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u8861\u91cf\u6570\u636e\u6ce2\u52a8\u5927\u5c0f\u7684\u6307\u793a\uff0c\u7ecf\u5e38\u88ab\u7528\u6765\u5206\u6790\u6570\u636e\u7684\u7a33\u5b9a\u6027\u3002\u90a3\u4e48\u4f60\u662f\u5426\u4e86\u89e3\u65b9\u5dee\u5462\uff1f\u5b83\u7684\u8ba1\u7b97\u516c\u5f0f\u53c8\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f\u672c\u6587\u609f\u7a7a\u6570\u5b66\u5c31\u6765\u8bb2\u89e3\u4e0b\u65b9\u5dee\u662f\u4ec0\u4e48\uff0c\u8ba1\u7b97\u516c\u5f0f\u53ca\u65b9\u5dee\u4e0e\u6807\u51c6\u7684\u5dee\u7684\u533a\u522b\uff0c\u5e26\u4f60\u6df1\u5165\u4e86\u89e3\u521d\u4e2d\u6570\u5b66\u77e5\u8bc6\u3002","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.wukongsch.com\/blog\/zh\/what-is-variance-post-41122\/#primaryimage","url":"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2024\/11\/image-15.png","contentUrl":"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/uploads\/2024\/11\/image-15.png","width":1026,"height":507,"caption":"\u65b9\u5dee\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\u516c\u5f0f\u3001\u65b9\u5dee\u4e0e\u6807\u51c6\u5dee\u533a\u522b"},{"@type":"WebSite","@id":"https:\/\/www.wukongsch.com\/blog\/#website","url":"https:\/\/www.wukongsch.com\/blog\/","name":"WuKong Edu Blog","description":"Get latest news of WuKong Education and Tips of WuKong Chinese, Math &amp; English ELA. We also share useful tips for Chinese learning &amp; International Math &amp; English reading, writing learning for 3-18 students.","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.wukongsch.com\/blog\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.wukongsch.com\/blog\/#\/schema\/person\/bbaca7aa958fcf6e4f8dd460901232b4","name":"Delvair | WuKong Math Teacher","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.wukongsch.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/litespeed\/avatar\/38501335435885934b278b7d6a8ed949.jpg?ver=1776938408","contentUrl":"https:\/\/wp-more.wukongedu.net\/blog\/wp-content\/litespeed\/avatar\/38501335435885934b278b7d6a8ed949.jpg?ver=1776938408","caption":"Delvair | WuKong Math Teacher"},"description":"Delvair, a graduate of the Federal University of Maranh\u00e3o in Brazil, is a dedicated educator with over six years of experience in school-based mathematics instruction. She specializes in advanced math pedagogy, with a particular expertise in Math Kangaroo competition coaching. Driven by the belief that education is the bedrock of a thriving society, Delvair is committed to creating an empowering environment where every child can excel. She holds the firm conviction that with the right guidance, every student possesses the potential to master complex mathematical concepts.","sameAs":["https:\/\/www.wukongsch.com\/blog\/author\/delvair\/","https:\/\/www.linkedin.com\/in\/delvairdiniz"],"url":"https:\/\/www.wukongsch.com\/blog\/author\/delvair\/"}]}},"amp_enabled":true,"read_time":"1","_links":{"self":[{"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/posts\/41122","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/users\/211806819"}],"replies":[{"embeddable":true,"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/comments?post=41122"}],"version-history":[{"count":2,"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/posts\/41122\/revisions"}],"predecessor-version":[{"id":46382,"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/posts\/41122\/revisions\/46382"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/media\/41123"}],"wp:attachment":[{"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/media?parent=41122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/categories?post=41122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp-more.wukongedu.net\/blog\/wp-json\/wp\/v2\/tags?post=41122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}