{"id":2552,"date":"2023-07-21T18:42:47","date_gmt":"2023-07-21T18:42:47","guid":{"rendered":"https:\/\/statorials.org\/cn\/sas%e4%b8%ad%e7%9a%84%e9%9f%a6%e5%b0%94%e5%a5%87t%e6%a3%80%e9%aa%8c\/"},"modified":"2023-07-21T18:42:47","modified_gmt":"2023-07-21T18:42:47","slug":"sas%e4%b8%ad%e7%9a%84%e9%9f%a6%e5%b0%94%e5%a5%87t%e6%a3%80%e9%aa%8c","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/sas%e4%b8%ad%e7%9a%84%e9%9f%a6%e5%b0%94%e5%a5%87t%e6%a3%80%e9%aa%8c\/","title":{"rendered":"\u5982\u4f55\u5728 sas \u4e2d\u6267\u884c welch t \u68c0\u9a8c"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u5f53<em>\u4e0d<\/em>\u5047\u8bbe\u4e24\u4e2a\u7ec4\u5177\u6709\u76f8\u7b49\u65b9\u5dee\u65f6\uff0c<a href=\"https:\/\/statorials.org\/cn\/\u97e6\u5c14\u5947t\u68c0\u9a8c\/\" target=\"_blank\" rel=\"noopener\">\u97e6\u5c14\u5947 t \u68c0\u9a8c<\/a>\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u72ec\u7acb\u7ec4\u4e4b\u95f4\u7684\u5747\u503c\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u672c\u6559\u7a0b\u4ecb\u7ecd\u5982\u4f55\u5728 SAS \u4e2d\u6267\u884c Welch t \u68c0\u9a8c\u3002<\/span><\/p>\n<h3><strong>\u793a\u4f8b\uff1aSAS \u4e2d\u7684 Welch t \u68c0\u9a8c<\/strong><\/h3>\n<p><span style=\"color: #000000;\">\u5047\u8bbe\u4e00\u4f4d\u8001\u5e08\u60f3\u8981\u6bd4\u8f83 12 \u540d\u4f7f\u7528\u5907\u8003\u624b\u518c\u51c6\u5907\u8003\u8bd5\u7684\u5b66\u751f\u4e0e 12 \u540d\u672a\u4f7f\u7528\u5907\u8003\u624b\u518c\u7684\u5b66\u751f\u7684\u8003\u8bd5\u7ed3\u679c\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u5217\u8868\u663e\u793a\u4e86\u5404\u7ec4\u5b66\u751f\u7684\u8003\u8bd5\u6210\u7ee9\uff1a<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u5c0f\u518c\u5b50<\/strong>: 90, 85, 88, 89, 94, 91, 79, 83, 87, 88, 91, 90<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u7b14\u8bb0\u672c\u53f7<\/strong>: 67, 90, 71, 95, 88, 83, 72, 66, 75, 86, 93, 84<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\u6267\u884c Welch t \u68c0\u9a8c\uff0c\u4ee5\u786e\u5b9a\u4e24\u7ec4\u4e4b\u95f4\u7684\u5e73\u5747\u8003\u8bd5\u5206\u6570\u662f\u5426\u76f8\u7b49\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u7b2c 1 \u6b65\uff1a\u521b\u5efa\u6570\u636e\u3002<\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\">\u9996\u5148\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u5728 SAS \u4e2d\u521b\u5efa\u6570\u636e\u96c6\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">\/*create dataset*\/\n<\/span><span style=\"color: #800080;\"><span style=\"color: #000000;\"><span style=\"color: #800080;\">data<\/span> exam_scores;\n    <span style=\"color: #3366ff;\">input<\/span> group $score;\n    <span style=\"color: #3366ff;\">datalines<\/span> ;\nbooklet 90\nbooklet 85\nbooklet 88\nbooklet 89\nbooklet 94\nbooklet 91\nbooklet 79\nbooklet 83\nbooklet 87\nbooklet 88\nbooklet 91\nbooklet 90\nno_booklet 67\nno_booklet 90\nno_booklet 71\nno_booklet 95\nno_booklet 88\nno_booklet 83\nno_booklet 72\nno_booklet 66\nno_booklet 75\nno_booklet 86\nno_booklet 93\nno_booklet 84\n;\n<span style=\"color: #800080;\">run<\/span> ;<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\"><strong>\u6b65\u9aa4 2\uff1a\u6267\u884c\u97e6\u5c14\u5947 t \u68c0\u9a8c\u3002<\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\">\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u4f7f\u7528<strong>proc ttetest<\/strong>\u6267\u884c Welch t \u68c0\u9a8c\uff1a<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">\/*perform Welch's t-test*\/\n<\/span><span style=\"color: #800080;\">proc ttest <span style=\"color: #000000;\"><span style=\"color: #3366ff;\">data<\/span> =exam_scores <span style=\"color: #3366ff;\">alpha<\/span> = <span style=\"color: #008000;\">0.05<\/span> ;\n    <span style=\"color: #3366ff;\">classgroup<\/span> ;\n    <span style=\"color: #3366ff;\">var<\/span> score;\n<span style=\"color: #800080;\">run<\/span> ;\n<\/span><\/span><\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-22680 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/welch1.jpg\" alt=\"\" width=\"502\" height=\"487\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p><span style=\"color: #000000;\">\u6700\u540e\u4e00\u4e2a\u6807\u9898\u4e3a<strong>\u65b9\u5dee\u76f8\u7b49\u7684<\/strong>\u8868\u6267\u884c F \u68c0\u9a8c\u4ee5\u786e\u5b9a\u4e24\u4e2a\u6837\u672c\u4e4b\u95f4\u7684\u65b9\u5dee\u662f\u5426\u76f8\u7b49\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6b64 F \u68c0\u9a8c\u4f7f\u7528\u4ee5\u4e0b\u539f\u5047\u8bbe\u548c\u5907\u62e9\u5047\u8bbe\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>H <sub>0<\/sub><\/strong> \uff1a\u65b9\u5dee\u76f8\u7b49\u3002<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>H <sub>A<\/sub><\/strong> \uff1a\u5dee\u5f02\u5e76\u4e0d\u76f8\u7b49\u3002<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u7531\u4e8e\u8be5\u68c0\u9a8c\u7684 p \u503c ( <strong>0.0046<\/strong> ) \u5c0f\u4e8e 0.05\uff0c\u56e0\u6b64\u6211\u4eec\u62d2\u7edd\u539f\u5047\u8bbe\u3002\u8fd9\u610f\u5473\u7740\u4e24\u4e2a\u6837\u672c\u7684\u65b9\u5dee\u4e0d\u76f8\u7b49\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u53c2\u8003\u5012\u6570\u7b2c\u4e8c\u4e2a\u8868\u4e2d\u6807\u8bb0\u4e3a<strong>Unequal<\/strong>\u7684\u884c\u6765\u786e\u5b9a\u4f7f\u7528\u54ea\u4e2a t \u503c\u548c\u76f8\u5e94\u7684 p \u503c\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">t \u503c\uff1a <strong>2.24<\/strong><\/span><\/li>\n<li> <span style=\"color: #000000;\">p \u503c\uff1a <strong>0.0417<\/strong><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u56de\u60f3\u4e00\u4e0b\uff0cWelch t \u68c0\u9a8c\u4f7f\u7528\u4ee5\u4e0b\u539f\u5047\u8bbe\u548c\u5907\u62e9\u5047\u8bbe\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>H <sub>0<\/sub> :<\/strong> \u00b5 <sub>1<\/sub> = \u00b5 <sub>2<\/sub><\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>H <sub>A<\/sub> :<\/strong> \u03bc <sub>1<\/sub> \u2260 \u03bc <sub>2<\/sub><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u7531\u4e8e p \u503c ( <strong>0.0417<\/strong> ) \u5c0f\u4e8e 0.05\uff0c\u56e0\u6b64\u6211\u4eec\u62d2\u7edd\u539f\u5047\u8bbe\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u8fd9\u610f\u5473\u7740\u6211\u4eec\u6709\u8db3\u591f\u7684\u8bc1\u636e\u8868\u660e\u4e24\u7ec4\u4e4b\u95f4\u7684\u5e73\u5747\u8003\u8bd5\u6210\u7ee9\u5e76\u4e0d\u76f8\u7b49\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u989d\u5916\u798f\u5229<\/strong>\uff1a\u60a8\u53ef\u4ee5\u968f\u610f\u4f7f\u7528\u8fd9\u4e2a<a href=\"https:\/\/statorials.org\/cn\/\u97e6\u5c14\u5947-t-\u68c0\u9a8c\u8ba1\u7b97\u5668\/\" target=\"_blank\" rel=\"noopener\">Welch t \u68c0\u9a8c\u8ba1\u7b97\u5668<\/a>\u6765\u81ea\u52a8\u5bf9\u4efb\u610f\u4e24\u4e2a\u6837\u672c\u6267\u884c Welch t \u68c0\u9a8c\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u6559\u7a0b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 SAS \u4e2d\u6267\u884c\u5176\u4ed6\u5e38\u89c1\u7edf\u8ba1\u6d4b\u8bd5\uff1a<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/cn\/\u6c14\u95f8\u5ba4\u4e2d\u7684-t-\u6d4b\u8bd5\u6837\u54c1\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 SAS \u4e2d\u6267\u884c\u5355\u6837\u672c t \u68c0\u9a8c<\/a><br \/>\u5982\u4f55\u5728 SAS \u4e2d\u6267\u884c\u53cc\u6837\u672c t \u68c0\u9a8c<br \/><a href=\"https:\/\/statorials.org\/cn\/sas\u4e2d\u7684\u914d\u5bf9t\u68c0\u9a8c\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 SAS \u4e2d\u6267\u884c\u914d\u5bf9\u6837\u672c t \u68c0\u9a8c<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u4e0d\u5047\u8bbe\u4e24\u4e2a\u7ec4\u5177\u6709\u76f8\u7b49\u65b9\u5dee\u65f6\uff0c\u97e6\u5c14\u5947 t \u68c0\u9a8c\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u72ec\u7acb\u7ec4\u4e4b\u95f4\u7684\u5747\u503c\u3002 \u672c\u6559\u7a0b\u4ecb\u7ecd\u5982\u4f55\u5728 SAS \u4e2d\u6267\u884c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-2552","post","type-post","status-publish","format-standard","hentry","category-11"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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