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decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568530\" alt=\"\" title=\"\" 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Kohavi, Diane Tang, Ya Xu 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decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568531\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h2>2.2 AB\u5b9e\u9a8c\u7edf\u8ba1\u5b66\u57fa\u7840<\/h2>\n<h3>2.2.1 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Estimation\uff09<\/strong><\/p>\n<p>\u70b9\u4f30\u8ba1\uff0c\u7b80\u800c\u8a00\u4e4b\u662f\u4f7f\u7528\u6837\u672c\u6570\u636e\u8ba1\u7b97\u4e00\u4e2a\u5355\u4e00\u7684\u6570\u503c\u6765\u4f30\u8ba1\u603b\u4f53\u53c2\u6570\u3002\u4f8b\u5982\u4e3a\u4e86\u8c03\u67e5\u67d0\u6279\u4ea7\u54c1\u7684\u5e9f\u54c1\u7387c\uff0c\u53ef\u4ee5\u4ece\u8be5\u6279\u4ea7\u54c1\u4e2d\u968f\u673a\u62bd\u53d6n\u4e2a\u4ea7\u54c1\u8fdb\u884c\u68c0\u67e5\uff0c\u8bb0a\u4e3a\u68c0\u67e5\u4ea7\u54c1\u4e2d\u4e3a\u5e9f\u54c1\u7684\u4e2a\u6570\uff0c\u5219\u53ef\u8003\u8651\u7528a\/n\u4f30\u8ba1\u603b\u4f53\u5e9f\u54c1\u7387c\u3002\u5e38\u7528\u7684\u6784\u9020\u70b9\u4f30\u8ba1\u7684\u65b9\u6cd5\u5305\u62ec\u77e9\u4f30\u8ba1\u3001\u6781\u5927\u4f3c\u7136\u4f30\u8ba1\u3001\u8d1d\u53f6\u65af\u4f30\u8ba1\u7b49\uff0c\u5728\u6b64\u4e0d\u8be6\u7ec6\u5c55\u5f00\u4ecb\u7ecd\u3002\u70b9\u4f30\u8ba1\u4f5c\u4e3a\u660e\u786e\u544a\u77e5\u201c\u672a\u77e5\u53c2\u6570\u662f\u591a\u5c11\u201d\u7684\u57fa\u672c\u624b\u6bb5\uff0c\u90a3\u4e48\u73b0\u5b9e\u4e2d\u600e\u4e48\u8bc4\u4f30\u70b9\u4f30\u8ba1\u51c6\u4e0d\u51c6\uff1f\u8fdb\u4e00\u6b65\u7684\u5bf9\u4e8e\u540c\u4e00\u53c2\u6570\uff0c\u4e0d\u540c\u4f30\u8ba1\u65b9\u6cd5\u6c42\u51fa\u7684\u4f30\u8ba1\u91cf\u53ef\u80fd\u4e0d\u4e00\u6837\uff0c\u90a3\u4e48\u5982\u4f55\u5224\u65ad\u4e0d\u540c\u7684\u4f30\u8ba1\u91cf\u4e4b\u95f4\u7684\u4f18\u52a3\u3002\u76f8\u5408\u6027\u3001\u65e0\u504f\u6027\u548c\u6709\u6548\u6027\u662f\u5e38\u7528\u76843\u4e2a\u6807\u51c6\u3002\u76f8\u5408\u6027\u6307\u5f53\u6837\u672c\u91cf\u65e0\u9650\u589e\u52a0\u65f6\uff0c\u70b9\u4f30\u8ba1\u503c\u8d8b\u8fd1\u4e8e\u603b\u4f53\u53c2\u6570\u503c\uff0c\u5373\u5927\u6837\u672c\u4e0b\u4f30\u8ba1\u91cf\u80fd\u591f\u51c6\u786e\u53cd\u6620\u603b\u4f53\u53c2\u6570\u3002\u65e0\u504f\u6027\u6307\u4ece\u6837\u672c\u4e2d\u5f97\u5230\u7684\u4f30\u8ba1\u91cf\u7684\u671f\u671b\u4e0e\u603b\u4f53\u53c2\u6570\u76f8\u7b49\uff0c\u800c\u6709\u6548\u6027\u5219\u6307\u5728\u6837\u672c\u91cf\u76f8\u540c\u60c5\u51b5\u4e0b\uff0c\u70b9\u4f30\u8ba1A\u65b9\u5dee&lt;\u70b9\u4f30\u8ba1B\u65b9\u5dee\u5219\u4ee3\u8868\u4f30\u8ba1\u91cfA\u66f4\u6709\u6548\u3002<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568532\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u4ece\u4e0a\u5f0f\u4e2d\u4e0d\u96be\u770b\u51fa\u4e00\u4e2a\u597d\u7684\u4f30\u8ba1\u9700\u8981\u6ee1\u8db3\u65e0\u504f\u6027\u6216\u8005\u6e10\u8fdb\u65e0\u504f\u6027\uff0c\u5373\u504f\u5deeBias\u7b49\u4e8e0\u6216\u8005\u968f\u7740\u6837\u672c\u91cf\u589e\u52a0\u8d8b\u4e8e0\u3002\u4e0e\u6b64\u540c\u65f6\u5728\u65e0\u504f\u6761\u4ef6\u4e0b\u65b9\u5dee\u8d8a\u5c0f\u5219\u70b9\u4f30\u8ba1\u4e0e\u53c2\u6570\u771f\u503c\u8d8a\u63a5\u8fd1\u3002\u901a\u5e38\u800c\u8a00\uff0c\u57fa\u4e8e\u6781\u5927\u4f3c\u7136\u4f30\u8ba1\u7b49\u65b9\u6cd5\u6784\u9020\u7684\u70b9\u4f30\u8ba1\u7684\u65b9\u5dee\u9879Var\u901a\u5e38\u4ee51\/n\u9636\u901f\u5ea6\u8d8b\u4e8e0\uff0c\u5176\u4e2dn\u4e3a\u6837\u672c\u91cf\u3002<\/p>\n<p>\u56de\u5230AB\u5b9e\u9a8c\uff0c\u5b9e\u9a8c\u8005\u901a\u5e38\u611f\u5174\u8da3\u7b56\u7565\u603b\u4f53\u63d0\u5347\u6548\u679cATE\uff0c\u65e8\u5728\u901a\u8fc7\u5b9e\u9a8c\u6536\u96c6\u6837\u672c\u6784\u9020 ATE\u7684\u70b9\u4f30\u8ba1\u3002\u5728SUTVA\u5047\u8bbe\u6210\u7acb\u7684\u968f\u673a\u5bf9\u7167\u5b9e\u9a8c\u4e0b\u76f4\u63a5\u5bf9\u6bd4\u5b9e\u9a8c\u7ec4\u3001\u5bf9\u7167\u7ec4\u8868\u73b0\u7684\u70b9\u4f30\u8ba1\u6ee1\u8db3\u76f8\u5408\u6027\u548c\u65e0\u504f\u6027\/\u6e10\u8fdb\u65e0\u504f\u6027\uff0c\u5e76\u4e14\u968f\u7740\u6837\u672c\u91cf\u7684\u589e\u957f\u70b9\u4f30\u8ba1\u503c\u8d8b\u8fd1\u4e8e\u603b\u4f53\u53c2\u6570\u503c\uff0c\u56e0\u4e3a\u65b9\u5dee\uff08\u62bd\u6837\/\u5206\u7ec4\u968f\u673a\u6027\u8d21\u732e\uff09\u968f\u7740\u6837\u672c\u91cf\u589e\u52a0\u4e5f\u8d8b\u5411\u4e8e0\u3002\u7136\u800c\u5bf9\u4e8eSUTVA\u5047\u8bbe\u4ee5\u53ca\u5206\u7ec4\u968f\u673a\u6027\u7684\u7834\u574f\uff0c\u4f1a\u5bfc\u81f4\u504f\u5deeBias\u5b58\u5728\u6216\u8005\u8bf4\u4e0d\u6536\u655b\u52300\u3002\u56e0\u6b64\u6b64\u65f6\u9700\u8981\u4e00\u4e9b\u590d\u6742\u5b9e\u9a8c\u8bbe\u8ba1\u3001\u5efa\u6a21\u5206\u6790\u4e0e\u56e0\u679c\u63a8\u65ad\u6280\u672f\u7740\u91cd\u6d88\u9664\u3001\u907f\u514d\u504f\u5dee\u9879\uff0c\u4ece\u800c\u4fdd\u8bc1\u70b9\u4f30\u8ba1\u7684\u51c6\u786e\u6027\u3002<\/p>\n<p><strong>\u7f6e\u4fe1\u533a\u95f4\uff08Confidence Interval\uff09<\/strong><\/p>\n<p>\u5bf9\u4e8e\u603b\u4f53\u7684\u672a\u77e5\u53c2\u6570\uff0c\u5728\u6709\u9650\u6837\u672c\u4e0b\u70b9\u4f30\u8ba1\u603b\u5b58\u5728\u4e00\u5b9a\u7684\u6ce2\u52a8\u6216\u8bef\u5dee\uff0c\u4e00\u4e2a\u53d6\u800c\u4ee3\u4e4b\u7684\u81ea\u7136\u60f3\u6cd5\u4e3a\uff1a\u517c\u987e\u6ce2\u52a8\u6027\u8003\u8651\u4f30\u8ba1\u53c2\u6570\u843d\u5728\u54ea\u4e2a\u533a\u95f4\u8303\u56f4\u5185\uff0c\u8fd9\u4fbf\u662f\u7edf\u8ba1\u5b66\u4e2d\u7ecf\u5178\u7684\u7f6e\u4fe1\u533a\u95f4\u6a21\u5757\u3002\u7f6e\u4fe1\u533a\u95f4\u987e\u540d\u601d\u4e49\u6307\u7684\u662f\u603b\u4f53\u53c2\u6570\u7684\u4e00\u4e2a\u533a\u95f4\u4f30\u8ba1\uff0c\u4ee595%\u7f6e\u4fe1\u533a\u95f4[a,b]\u4e3a\u4f8b\uff0c\u5176\u8868\u660e\u533a\u95f4[a,b]\u5305\u542b\u53c2\u6570\u771f\u503c\u7684\u6982\u7387\u572895%\u5de6\u53f3\u3002\u4f8b\u5982\u5047\u8bbe\u6211\u4eec\u8981\u4f30\u8ba1\u67d0\u57ce\u5e02\u4e2d\u6240\u6709\u5c45\u6c11\u7684\u5e73\u5747\u6536\u5165\u3002\u6211\u4eec\u4ece\u8fd9\u4e2a\u57ce\u5e02\u4e2d\u968f\u673a\u62bd\u53d6\u4e86\u4e00\u90e8\u5206\u6837\u672c\uff0c\u5e76\u8ba1\u7b97\u4e8695%\u7684\u7f6e\u4fe1\u533a\u95f4\u7ed3\u679c\u4e3a[5000\u5143, 7000\u5143]\u3002\u8fd9\u610f\u5473\u7740\u6211\u4eec\u670995%\u7684\u4fe1\u5fc3\u8ba4\u4e3a\uff0c\u6574\u4e2a\u57ce\u5e02\u4e2d\u6240\u6709\u5c45\u6c11\u7684\u5e73\u5747\u6536\u5165\u57285000\u5143\u52307000\u5143\u4e4b\u95f4\u3002\u53c8\u4f8b\u5982\u5728\u5bf9\u6bd4\u65b0App\u9875\u9762\u8bbe\u8ba1\u4e0e\u65e7\u9875\u9762\u8bbe\u8ba1AB\u5b9e\u9a8c\u4e2d\uff0c\u8003\u8651\u5230\u5355\u6b21\u5b9e\u9a8c\u4e0b\u968f\u673a\u5206\u7ec4\u6ce2\u52a8\u6027\uff0c\u8f6c\u5316\u7387\u63d0\u5347\u503c\u70b9\u4f30\u8ba10.03\u4e0e\u771f\u5b9e\u6548\u679c\u7406\u8bba\u503c\u5b58\u5728\u4e00\u5b9a\u7684\u6ce2\u52a8\uff0c\u6b64\u65f6\u53ef\u8fdb\u4e00\u6b65\u53c2\u800395%\u7f6e\u4fe1\u533a\u95f4\u4f30\u8ba1[\u22120.00136,0.06136]\uff0c\u5373\u5224\u65ad\u7f6e\u4fe1\u533a\u95f4[\u22120.00136,0.06136]\u5305\u542b\u771f\u5b9e\u7b56\u7565\u6548\u679c\u7406\u8bba\u503c\u7684\u628a\u63e1\u572895%\u4ee5\u4e0a\uff0c\u6216\u8005\u8bf4\u670995%\u4ee5\u4e0a\u4fe1\u5fc3\u5224\u65ad\u771f\u5b9e\u63d0\u5347\u6548\u679c\u5728\u22120.00136\uff5e0.06136\u4e4b\u95f4\u3002\u901a\u5e38\u800c\u8a00\u5728\u7f6e\u4fe1\u6c34\u5e73\u56fa\u5b9a\u60c5\u51b5\u4e0b\u533a\u95f4\u957f\u5ea6\u8d8a\u77ed\u8d8a\u597d\uff0c\u5b66\u4e1a\u754c\u6700\u7ecf\u5178\u768495%\u7f6e\u4fe1\u533a\u95f4\u6784\u9020\u65b9\u5f0f\u4e3a$\/widehat{\/theta} \/pm 1.96*\/sqrt{Var(\/widehat{\/theta})}$\uff0c\u5373\u5728\u70b9\u4f30\u8ba1\u57fa\u7840\u4e0a\u589e\u52a0\u4e00\u4e2a\u6ce2\u52a8\u8303\u56f4\u3002\u4ece\u7f6e\u4fe1\u533a\u95f4\u6784\u9020\u5f62\u5f0f\u4e0a\u4e5f\u4e0d\u96be\u770b\u51fa\u968f\u7740\u6837\u672c\u91cf\u7684\u4e0d\u65ad\u589e\u52a0\uff0c\u7f6e\u4fe1\u533a\u95f4\u53d8\u5f97\u8d8a\u6765\u8d8a\u7a84\u5e76\u6536\u655b\u5230\u53c2\u6570\u771f\u503c\u70b9\u3002<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568533\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h3>2.2.2 \u5047\u8bbe\u68c0\u9a8c<\/h3>\n<p>\u5047\u8bbe\u68c0\u9a8c\uff08Hypothesis testing\uff09\u662f\u7edf\u8ba1\u5b66\u4e2d\u7528\u6570\u636e\u8bba\u8bc1\u67d0\u5047\u8bbe\u662f\u5426\u6210\u7acb\u7684\u65b9\u6cd5\uff0c\u5728\u5de5\u7a0b\u3001\u533b\u5b66\u3001\u793e\u4f1a\u79d1\u5b66\u7b49\u591a\u4e2a\u9886\u57df\u5e7f\u6cdb\u5e94\u7528\u3002\u5047\u8bbe\u68c0\u9a8c\u672c\u8d28\u53ef\u7406\u89e3\u4e3a\u53cd\u8bc1\u6cd5\uff0c\u6709\u70b9\u7c7b\u4f3c\u4e8e\u6cd5\u5ead\u7684\u8bc4\u7406\uff0c\u60f3\u8c61\u6cd5\u5ead\u4e0a\u6709\u4e00\u540d\u88ab\u544a\uff0c\u5728\u5f00\u59cb\u65e0\u4fe1\u606f\u65f6\u5047\u8bbe\u88ab\u544a\u662f\u6e05\u767d\u7684\uff08\u539f\u5047\u8bbe\uff09\uff0c\u800c\u68c0\u5bdf\u5b98\u5fc5\u987b\u8981\u63d0\u51fa\u8db3\u591f\u7684\u8bc1\u636e\u53bb\u8bc1\u660e\u88ab\u544a\u7684\u786e\u6709\u7f6a\u3002\u5982\u679c\u6ca1\u6709\u8db3\u591f\u7684\u4fe1\u606f\u548c\u8bc1\u636e\u8bc1\u660e\u88ab\u544a\u6709\u7f6a\uff0c\u90a3\u4e48\u5224\u5b9a\u539f\u5047\u8bbe\uff1a\u88ab\u544a\u6e05\u767d\u6210\u7acb\u3002\u9664\u975e\u68c0\u5bdf\u5b98\u63d0\u4f9b\u8db3\u591f\u7684\u8bc1\u636e\u624d\u5224\u5b9a\u88ab\u544a\u6709\u7f6a\u3002\u7edf\u8ba1\u5b66\u5bb6Fisher\u63d0\u8fc7\u4e00\u4e2a\u5973\u58eb\u54c1\u8336\u7684\u5047\u8bbe\u68c0\u9a8c\u8457\u540d\u4f8b\u5b50\uff0c\u4e00\u540d\u5973\u58eb\u58f0\u79f0\u5176\u53ef\u4ee5\u54c1\u5c1d\u51fa\u5976\u8336\u5236\u4f5c\u8fc7\u7a0b\u4e2d\u662f\u5148\u52a0\u5165\u8336\u8fd8\u662f\u5148\u52a0\u5165\u725b\u5976\u3002Fisher\u63d0\u8bae\u7ed9\u5979\u516b\u676f\u5976\u8336\uff0c\u5e76\u544a\u77e5\u5176\u4e2d\u56db\u676f\u5148\u52a0\u8336\uff0c\u56db\u676f\u5148\u52a0\u725b\u5976\uff0c\u4f46\u968f\u673a\u6392\u5217\uff0c\u9700\u8981\u5973\u58eb\u8bf4\u51fa\u8fd9\u516b\u676f\u5976\u8336\u4e2d\uff0c\u54ea\u4e9b\u5148\u52a0\u725b\u5976\uff0c\u54ea\u4e9b\u5148\u52a0\u8336\u3002\u539f\u5047\u8bbe\u662f\u8be5\u5973\u58eb\u65e0\u6cd5\u5224\u65ad\u5976\u8336\u4e2d\u7684\u8336\u5148\u52a0\u5165\u8fd8\u662f\u725b\u5976\u5148\u52a0\u5165\uff0c\u6839\u636e\u731c\u4e2d\u7684\u6b21\u6570\u5224\u65ad\u8be5\u5047\u8bbe\u662f\u5426\u6210\u7acb\u3002\u7ed3\u679c\u5973\u58eb\u6d4b\u8bd5\u7ed3\u679c\u4e3a\u516b\u676f\u54c1\u5c1d\u90fd\u6b63\u786e\u3002\u5728\u539f\u5047\u8bbe\u4e0b\u82e5\u5355\u7eaf\u4ee5\u6982\u7387\u8003\u8651\uff0c\u516b\u676f\u90fd\u6b63\u786e\u7684\u6982\u7387\u4e3a1\/70\uff08\u56e0\u4e3a8\u90094\u7684\u7ec4\u5408\u6570\u662f70\uff09\uff0c\u7ea61.43%\uff0c\u5373\u539f\u5047\u8bbe\u6210\u7acb\u4e0b\u7edf\u8ba1\u4e0a\u5b8c\u5168\u731c\u5bf9\u53ef\u80fd\u6027\u6781\u5c0f\uff0c\u5355\u6b21\u6d4b\u8bd5\u57fa\u672c\u4e0a\u4e0d\u4f1a\u53d1\u751f\uff0c\u5373\u51e0\u4e4e\u6392\u9664\u5973\u58eb\u5b8c\u5168\u76f2\u731c\u6b63\u786e\u7684\u53ef\u80fd\uff0c\u56e0\u6b64\u6211\u4eec\u6709\u7406\u7531\u53bb\u62d2\u7edd\u201c\u8be5\u5973\u58eb\u65e0\u6cd5\u5224\u65ad\u5976\u8336\u4e2d\u7684\u8336\u5148\u52a0\u5165\u8fd8\u662f\u725b\u5976\u5148\u52a0\u5165\u201d\u7684\u5047\u8bbe\u3002<\/p>\n<p>\u7c7b\u4f3c\u7684\uff0c\u5047\u8bbe\u68c0\u9a8c\u5728AB\u5b9e\u9a8c\u4e2d\u901a\u5e38\u88ab\u4f5c\u4e3a\u57fa\u672c\u5de5\u5177\u8bba\u8bc1\u65b0\u7b56\u7565\u662f\u5426\u76f8\u5bf9\u65e7\u7b56\u7565\u4f1a\u5e26\u6765\u4e1a\u52a1\u6536\u76ca\u3002\u4f8b\u5982\u5f53\u6d4b\u8bd5\u4e00\u4e2a\u65b0\u7684App\u5e7f\u544a\u8bbe\u8ba1\u662f\u5426\u80fd\u63d0\u9ad8\u7528\u6237\u70b9\u51fb\u7387\u65f6\uff0c\u901a\u5e38\u539f\u5047\u8bbe\u65b0\u7b56\u7565\u76f8\u5bf9\u65e7\u7b56\u7565\u65e0\u6548\uff0c\u7136\u540e\u6536\u96c6\u73b0\u6709\u8bc1\u636e&#8211;\u6837\u672c\u6570\u636e\u53bb\u8bba\u8bc1\u5b9e\u9a8c\u7ec4\u548c\u5bf9\u7167\u7ec4\u4e4b\u95f4\u662f\u5426\u5177\u6709\u663e\u8457\u7684\u5dee\u5f02\uff0c\u5982\u679c\u62e5\u6709\u8db3\u591f\u8bc1\u636e\u2014\u2014\u5b9e\u9a8c\u7ec4\u5bf9\u7167\u7ec4\u5dee\u5f02\u5f88\u5927\uff08\u8fd9\u5728\u65b0\u7b56\u7565\u65e0\u6548\u4e0b\u57fa\u672c\u4e0a\u4e0d\u592a\u53ef\u80fd\u51fa\u73b0\uff09\uff0c\u5219\u63a8\u7ffb\u201c\u65b0\u7b56\u7565\u76f8\u5bf9\u65e7\u7b56\u7565\u65e0\u6548\u201d\u7684\u5047\u8bbe\uff0c\u5426\u5219\u8ba4\u4e3a\u5728\u73b0\u6709\u8bc1\u636e\u2014\u2014\u6837\u672c\u4fe1\u606f\u4e0b\u63a5\u53d7\u539f\u5047\u8bbe\u6210\u7acb\uff0c\u9664\u975e\u6536\u96c6\u66f4\u591a\u8bc1\u636e(\u6837\u672c\u6570\u636e)\u518d\u201c\u91cd\u65b0\u5f00\u5ead\u8bba\u8bc1\u201d\u3002\u4e00\u4e2a\u5b8c\u6574\u7684\u5047\u8bbe\u68c0\u9a8c\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n<p><strong>1.\u63d0\u51fa\u5047\u8bbe<\/strong><\/p>\n<ul>\n<li>\u539f\u5047\u8bbe\uff08Null Hypothesis\uff0c\u901a\u5e38\u9009\u62e9\u4e3a\u9ed8\u8ba4\u7ed3\u8bba\u6216\u8005\u9700\u63a8\u7ffb\u7684\u7ed3\u8bba\uff09H0\uff1a\u5b9e\u9a8c\u7ec4\u4e0e\u5bf9\u7167\u7ec4\u65e0\u5dee\u5f02\uff0c\u8868\u793a\u7b56\u7565\u65e0\u6548\u679c\u3002<\/li>\n<li>\u5907\u62e9\u5047\u8bbe\uff08Alternative Hypothesis\uff0c\u901a\u5e38\u4e3a\u60f3\u88ab\u8bc1\u660e\u7684\u7ed3\u8bba\uff09H1\uff1a\u5b9e\u9a8c\u7ec4\u4e0e\u5bf9\u7167\u7ec4\u6709\u5dee\u5f02\uff0c\u4e5f\u53ef\u8003\u8651\u5355\u8fb9\u5907\u62e9\u5047\u8bbeH1\uff1a\u5b9e\u9a8c\u7ec4&gt;\u5bf9\u7167\u7ec4\uff0c\u6216\u8005H1\uff1a\u5b9e\u9a8c\u7ec4&lt;\u5bf9\u7167\u7ec4\u3002\u4f46\u5728AB\u5b9e\u9a8c\u4e2d\u4e3a\u540c\u65f6\u517c\u987e\u6536\u76ca\u548c\u98ce\u9669\u901a\u5e38\u9ed8\u8ba4\u9009\u62e9\u53cc\u8fb9\u5907\u62e9\u5047\u8bbe\u3002<\/li>\n<\/ul>\n<p><strong>2.\u9009\u62e9\u663e\u8457\u6027\u6c34\u5e73<\/strong><\/p>\n<p>\u663e\u8457\u6027\u6c34\u5e73\uff08\u03b1\uff09\u6307\u80fd\u5bb9\u5fcd\u7684\u72af\u7b2c\u4e00\u7c7b\u9519\u8bef\u7684\u6982\u7387\uff0c\u5176\u4e2d\u7b2c\u4e00\u7c7b\u9519\u8bef\u662f\u6307\u5728\u539f\u5047\u8bbe\u4e3a\u771f\u65f6\uff0c\u62d2\u7edd\u539f\u5047\u8bbe\u7684\u72af\u9519\uff0c\u53c8\u79f0\u5047\u9633\u6027\u3002\u663e\u8457\u6027\u6c34\u5e73\u662f\u4eba\u4e3a\u5b9a\u4e49\u6216\u6307\u5b9a\u7684\u6982\u7387\u503c\uff0c\u5b66\u4e1a\u754c\u5e38\u89c1\u7684\u663e\u8457\u6027\u6c34\u5e73\u4e3a0.05\u3002<\/p>\n<p><strong>3.\u6784\u9020\u68c0\u9a8c\u7edf\u8ba1\u91cf<\/strong><\/p>\n<p>\u6839\u636e\u6837\u672c\u6570\u636e\u548c\u5047\u8bbe\u7c7b\u578b\uff0c\u9009\u62e9\u5408\u9002\u7684\u68c0\u9a8c\u7edf\u8ba1\u91cf\uff0cAB\u5b9e\u9a8c\u4e2d\u6700\u5e38\u7528\u7684\u65b9\u5f0f\u4e3a\u53cc\u6837\u672ct\u68c0\u9a8c\u3002\u4f8b\u5982\u5728\u63a2\u7d22\u67d0\u7b56\u7565\u662f\u5426\u4f1a\u5e26\u6765\u5355\u91cf\u589e\u957f\u65f6\uff0c\u6309\u7528\u6237\u968f\u673a\u5bf9\u7167\u8bd5\u9a8c\u53ef\u8003\u8651\u6784\u9020\u68c0\u9a8c\u7edf\u8ba1\u91cf\uff1a<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568534\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u5176\u4e2d\u65b9\u5dee\u8ba1\u7b97\u5e38\u7528\u7b97\u6cd5\u5305\u62ecDelta\u65b9\u6cd5\u3001Bootstrap\u3001Jackknife\u65b9\u6cd5\u7b49\uff0c\u5f53\u7136\u68c0\u9a8c\u65b9\u5f0f\u4e5f\u5305\u62ec\u53c2\u6570\u68c0\u9a8c\u3001\u975e\u53c2\u6570\u68c0\u9a8c\u7b49\u3002<\/p>\n<p><strong>4.\u8ba1\u7b97\u62d2\u7edd\u57df\u548cp\u503c<\/strong><\/p>\n<p>\u62d2\u7edd\u57df\u662f\u6307\u5728\u5047\u8bbe\u68c0\u9a8c\u4e2d\u62d2\u7edd\u539f\u5047\u8bbe\u7684\u68c0\u9a8c\u7edf\u8ba1\u91cf\u7684\u53d6\u503c\u8303\u56f4\uff0c\u5176\u901a\u5e38\u4f9d\u8d56\u4e8e\u663e\u8457\u6027\u6c34\u5e73\u7b49\u3002\u5c3d\u7ba1\u53ef\u901a\u8fc7\u5224\u65ad\u68c0\u9a8c\u7edf\u8ba1\u91cf\u89c2\u6d4b\u503c\u662f\u5426\u843d\u5728\u62d2\u7edd\u57df\u51b3\u7b56\u62d2\u7edd\/\u63a5\u53d7\u539f\u5047\u8bbe\uff0c\u5047\u8bbe\u68c0\u9a8c\u5b9e\u9645\u5e94\u7528\u4e2d\u901a\u5e38\u8003\u8651\u4e00\u4e2a\u66f4\u5e38\u7528\u7684\u6807\u51c6\u2014\u2014P\u503c\u3002P\u503c\u8868\u793a\u5728\u539f\u5047\u8bbe\u4e3a\u771f\u65f6\uff0c\u6bd4\u6240\u5f97\u5230\u7684\u7edf\u8ba1\u91cf\u89c2\u5bdf\u7ed3\u679c\u66f4\u6781\u7aef\u7684\u6982\u7387\u3002\u5176\u8ba1\u7b97\u903b\u8f91\u4e3a\u5148\u63a8\u5bfc\u51fa\u5728\u539f\u5047\u8bbeH0\u6210\u7acb\u6761\u4ef6\u4e0b\u68c0\u9a8c\u7edf\u8ba1\u91cf\u7684\u6982\u7387\u5206\u5e03\uff08\u5728AB\u5b9e\u9a8c\u573a\u666f\u53ef\u4ee5\u60f3\u8c61\u4e3a\uff0c\u5728\u7b56\u7565\u65e0\u6548\u573a\u666f\u4e0b\uff0c\u5047\u8bbe\u5141\u8bb8\u505a\u65e0\u6570\u6b21\u5b9e\u9a8c\uff0c\u6bcf\u6b21\u5b9e\u9a8c\u72ec\u7acb\u6267\u884c\u5206\u7ec4\u673a\u5236\uff0c\u5e76\u4e14\u5f97\u5230\u4e00\u4e2a\u68c0\u9a8c\u7edf\u8ba1\u91cf\uff0c\u57fa\u4e8e\u82e5\u5e72\u6b21\u5b9e\u9a8c\u5f97\u5230\u7684\u82e5\u5e72\u4e2a\u68c0\u9a8c\u7edf\u8ba1\u91cf\u89c2\u6d4b\u503c\u753b\u56fe\uff0c\u5373\u5f97\u5230H0\u4e0b\u4e14\u5728\u5bf9\u5e94\u5b9e\u9a8c\u5206\u7ec4\u673a\u5236\u4e0b\u7684\u68c0\u9a8c\u7edf\u8ba1\u91cf\u7684\u6982\u7387\u5206\u5e03\u3002\u73b0\u5b9e\u4e2d\u53ef\u901a\u8fc7\u4e00\u4e9b\u6781\u9650\u7406\u8bba\u7b49\u7edf\u8ba1\u5b9a\u7406\u6027\u8d28\u6765\u57fa\u672c\u8fd1\u4f3c\u83b7\u5f97\u539f\u5047\u8bbeH0\u6210\u7acb\u6761\u4ef6\u4e0b\u68c0\u9a8c\u7edf\u8ba1\u91cf\u7684\u6982\u7387\u5206\u5e03\uff09\uff0c\u7136\u540e\u518d\u8ba1\u7b97\u89c2\u5bdf\u5230\u6bd4\u5f53\u524d\u6837\u672c\u4e0b\u68c0\u9a8c\u7edf\u8ba1\u91cf\u89c2\u6d4b\u503c\u66f4\u6781\u7aef\u7684\u6982\u7387\uff0c\u76f4\u89c2\u4e0a\u4e5f\u53ef\u7406\u89e3\u4e3a\u5728\u539f\u5047\u8bbe\u6210\u7acb\u60c5\u51b5\u4e0b\uff0c\u51fa\u73b0\u5f53\u524d\u89c2\u6d4b\u503c\u53ca\u66f4\u6781\u7aef\u573a\u666f\u7684\u6982\u7387\uff0c\u5982\u679c\u5f88\u5c0f\u5219\u610f\u5473\u7740\u539f\u5047\u8bbe\u6210\u7acb\u4e0b\u5355\u6b21\u5b9e\u9a8c\u4e0d\u592a\u80fd\u51fa\u73b0\u7684\u5c0f\u6982\u7387\u4e8b\u4ef6\u53d1\u751f\u4e86\uff0c\u9700\u8d28\u7591\u751a\u81f3\u62d2\u7edd\u539f\u5047\u8bbe\u3002<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568535\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p><strong>5.\u4f5c\u51fa\u51b3\u7b56<\/strong><\/p>\n<p>\u5047\u8bbe\u68c0\u9a8c\u7684\u6838\u5fc3\u601d\u60f3\u53cd\u8bc1\u6cd5\uff0c\u7406\u8bba\u4e0a\u5c0f\u6982\u7387\u4e8b\u4ef6\u5728\u4e00\u6b21\u5b9e\u9a8c\u4e2d\u51e0\u4e4e\u4e0d\u53ef\u80fd\u53d1\u751f\uff0c\u5982\u679c\u53d1\u751f\u4e86\u5219\u8bf4\u660e\u539f\u5047\u8bbe\u4e0d\u5408\u7406\u3002\u56e0\u6b64\u53ef\u901a\u8fc7\u6bd4\u8f83p\u503c\u4e0e\u663e\u8457\u6027\u6c34\u5e73\u03b1\uff1a<\/p>\n<ul>\n<li>\u5982\u679cp\u503c \u2264 \u03b1\uff0c\u62d2\u7edd\u539f\u5047\u8bbe\uff0c\u652f\u6301\u5907\u62e9\u5047\u8bbe\u3002<\/li>\n<li>\u5982\u679cp\u503c &gt; \u03b1\uff0c\u63a5\u53d7\u539f\u5047\u8bbe\uff0c\u62d2\u7edd\u5907\u62e9\u5047\u8bbe\u3002<\/li>\n<\/ul>\n<h3>2.2.3 \u6781\u9650\u7406\u8bba<\/h3>\n<p>\u6781\u9650\u7406\u8bba\u662f\u5047\u8bbe\u68c0\u9a8c\u4e0e\u7f6e\u4fe1\u533a\u95f4\u7b49\u8fc7\u7a0b\u4e2d\u6784\u5efa\u7edf\u8ba1\u91cf\u5206\u5e03\u7684\u7406\u8bba\u57fa\u7840\uff0c\u662f\u7edf\u8ba1\u5b66\u4e2d\u4e00\u4e2a\u5e9e\u5927\u4e14\u5185\u5bb9\u4e30\u5bcc\u7684\u5173\u952e\u6a21\u5757\u3002\u7531\u4e8e\u4e3b\u9898\u548c\u7bc7\u5e45\u7684\u9650\u5236\uff0c\u672c\u767d\u76ae\u4e66\u5c06\u4e0d\u5bf9\u5176\u8fdb\u884c\u6df1\u5165\u63a2\u8ba8\uff0c\u4ec5\u7b80\u8981\u4ecb\u7ecd\u51e0\u4e2a\u5e38\u7528\u7684\u539f\u7406\u3002\u8bfb\u8005\u4e5f\u53ef\u9009\u62e9\u8df3\u8fc7\u672c\u90e8\u5206\u5185\u5bb9\u3002<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568536\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568537\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568538\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568539\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h2>2.3 \u5e38\u7528\u5b9e\u9a8c\u672f\u8bed<\/h2>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046568540\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h2>\u5199\u5728\u540e\u9762<\/h2>\n<p>\u540e\u7eed\uff0c\u6211\u4eec\u5c06\u5728\u7f8e\u56e2\u6280\u672f\u56e2\u961f\u5fae\u4fe1\u516c\u4f17\u53f7\u4e0a\u9646\u7eed\u63a8\u51fa\u7b2c3\u7ae0\u8282~\u7b2c8\u7ae0\u8282\u7684\u5185\u5bb9\uff0c\u656c\u8bf7\u671f\u5f85\u3002\u5982\u679c\u5927\u5bb6\u53d1\u73b0\u95ee\u9898\uff0c\u6216\u8005\u6709\u4e00\u4e9b\u5efa\u8bae\uff0c\u4e5f\u6b22\u8fce\u5728\u6587\u672b\u7559\u8a00\uff0c\u8ddf\u6211\u4eec\u8fdb\u884c\u4ea4\u6d41\u3002<\/p>\n<p><strong>\u9605\u8bfb\u66f4\u591a<\/strong><\/p>\n<p>| \u5173\u6ce8\u300c\u7f8e\u56e2\u6280\u672f\u56e2\u961f\u300d\u5fae\u4fe1\u516c\u4f17\u53f7\uff0c\u5728\u516c\u4f17\u53f7\u83dc\u5355\u680f\u5bf9\u8bdd\u6846\u56de\u590d\u30102024 \u5e74\u8d27\u3011\u3001\u30102023 \u5e74\u8d27\u3011\u3001\u30102023 \u5e74\u8d27\u3011\u3001\u30102022 \u5e74\u8d27\u3011\u3001\u30102021 \u5e74\u8d27\u3011\u3001\u30102020 \u5e74\u8d27\u3011\u3001\u30102019 \u5e74\u8d27\u3011\u3001\u30102018 \u5e74\u8d27\u3011\u3001\u30102017 \u5e74\u8d27\u3011\u7b49\u5173\u952e\u8bcd\uff0c\u53ef\u67e5\u770b\u7f8e\u56e2\u6280\u672f\u56e2\u961f\u5386\u5e74\u6280\u672f\u6587\u7ae0\u5408\u96c6\u3002<\/p>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000046195963\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>| \u672c\u6587\u7cfb\u7f8e\u56e2\u6280\u672f\u56e2\u961f\u51fa\u54c1\uff0c\u8457\u4f5c\u6743\u5f52\u5c5e\u7f8e\u56e2\u3002\u6b22\u8fce\u51fa\u4e8e\u5206\u4eab\u548c\u4ea4\u6d41\u7b49\u975e\u5546\u4e1a\u76ee\u7684\u8f6c\u8f7d\u6216\u4f7f\u7528\u672c\u6587\u5185\u5bb9\uff0c\u656c\u8bf7\u6ce8\u660e &#8220;\u5185\u5bb9\u8f6c\u8f7d\u81ea\u7f8e\u56e2\u6280\u672f\u56e2\u961f&#8221;\u3002\u672c\u6587\u672a\u7ecf\u8bb8\u53ef\uff0c\u4e0d\u5f97\u8fdb\u884c\u5546\u4e1a\u6027\u8f6c\u8f7d\u6216\u8005\u4f7f\u7528\u3002\u4efb\u4f55\u5546\u7528\u884c\u4e3a\uff0c\u8bf7\u53d1\u9001\u90ae\u4ef6\u81f3 <a href=\"https:\/\/segmentfault.com\/a\/mailto:tech@meituan.com\" target=\"_blank\" rel=\"noopener noreferrer\">tech@meituan.com<\/a> \u7533\u8bf7\u6388\u6743\u3002<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000046568526\">https:\/\/segmentfault.com\/a\/1190000046568526<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u8be6\u7ec6\u9610\u8ff0\u4e86AB\u5b9e\u9a8c\u7684\u6982\u5ff5\u4e0e\u5176\u4ef7\u503c\uff0c\u5e76\u7ed3\u5408\u7f8e\u56e2\u7684\u5b9e\u9645\u60c5\u51b5\uff0c\u63a2\u8ba8\u4e86AB\u5b9e\u9a8c\u4e2d\u5e38\u89c1\u7684\u6311\u6218\u53ca\u5efa\u8bbe\u7ecf [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10020802","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10020802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10020802"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10020802\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10020802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10020802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10020802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}