{"id":1128,"date":"2023-07-27T13:46:28","date_gmt":"2023-07-27T13:46:28","guid":{"rendered":"https:\/\/statorials.org\/ko\/r%e1%84%8b%e1%85%b4-%e1%84%8b%e1%85%b0%e1%86%af%e1%84%8e%e1%85%b5-t-%e1%84%90%e1%85%a6%e1%84%89%e1%85%b3%e1%84%90%e1%85%b3\/"},"modified":"2023-07-27T13:46:28","modified_gmt":"2023-07-27T13:46:28","slug":"r%e1%84%8b%e1%85%b4-%e1%84%8b%e1%85%b0%e1%86%af%e1%84%8e%e1%85%b5-t-%e1%84%90%e1%85%a6%e1%84%89%e1%85%b3%e1%84%90%e1%85%b3","status":"publish","type":"post","link":"https:\/\/statorials.org\/ko\/r%e1%84%8b%e1%85%b4-%e1%84%8b%e1%85%b0%e1%86%af%e1%84%8e%e1%85%b5-t-%e1%84%90%e1%85%a6%e1%84%89%e1%85%b3%e1%84%90%e1%85%b3\/","title":{"rendered":"R\uc5d0\uc11c welch\uc758 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><a href=\"https:\/\/statorials.org\/ko\/\u110b\u1170\u11af\u110e\u1175\u1109\u1173-t-\u1110\u1166\u1109\u1173\u1110\u1173\/\" target=\"_blank\" rel=\"noopener\">Welch\uc758 t-\uac80\uc815\uc740<\/a> \ub450 \uadf8\ub8f9\uc758 \ubd84\uc0b0\uc774 \ub3d9\uc77c\ud558\ub2e4\uace0 \uac00\uc815\ub418\uc9c0 <em>\uc54a\ub294<\/em> \uacbd\uc6b0 \ub450 \ub3c5\ub9bd \uadf8\ub8f9 \uac04\uc758 \ud3c9\uade0\uc744 \ube44\uad50\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">R\uc5d0\uc11c Welch\uc758 t-\ud14c\uc2a4\ud2b8\ub97c \uc218\ud589\ud558\ub824\uba74 \ub2e4\uc74c \uad6c\ubb38\uc744 \uc0ac\uc6a9\ud558\ub294 <strong>t.test()<\/strong> \ud568\uc218\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>t.test(x, y, Alternative = c(\u201c\ub450 \uc5bc\uad74\u201d, \u201c\uc801\uc74c\u201d, \u201c\ub354 \ud07c\u201d))<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">\uae08:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>x:<\/strong> \uccab \ubc88\uc9f8 \uadf8\ub8f9\uc5d0 \ub300\ud55c \ub370\uc774\ud130 \uac12\uc758 \uc22b\uc790\ud615 \ubca1\ud130<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>y:<\/strong> \ub450 \ubc88\uc9f8 \uadf8\ub8f9\uc5d0 \ub300\ud55c \ub370\uc774\ud130 \uac12\uc758 \uc22b\uc790\ud615 \ubca1\ud130<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>\ub300\uc548:<\/strong> \uac80\uc815\uc5d0 \ub300\ud55c \ub300\ub9bd \uac00\uc124\uc785\ub2c8\ub2e4. \uae30\ubcf8\uac12\uc740 \uc591\uba74\uc785\ub2c8\ub2e4.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \uc608\uc5d0\uc11c\ub294 \uc774 \ud568\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec R\uc5d0\uc11c Welch\uc758 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>\uc608: R\uc758 Welch\uc758 t-\uac80\uc815<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\uad50\uc0ac\ub294 \uc2dc\ud5d8 \uc900\ube44 \ucc45\uc790\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc2dc\ud5d8\uc744 \uc900\ube44\ud55c 12\uba85\uc758 \ud559\uc0dd\uacfc \uadf8\ub807\uc9c0 \uc54a\uc740 12\uba85\uc758 \ud559\uc0dd\uc758 \uc2dc\ud5d8 \uacb0\uacfc\ub97c \ube44\uad50\ud558\ub824\uace0 \ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ubca1\ud130\ub294 \uac01 \uadf8\ub8f9\uc5d0 \uc18d\ud55c \ud559\uc0dd\ub4e4\uc758 \uc2dc\ud5d8 \uacb0\uacfc\ub97c \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>booklet &lt;- c(90, 85, 88, 89, 94, 91, 79, 83, 87, 88, 91, 90)\nno_booklet &lt;- c(67, 90, 71, 95, 88, 83, 72, 66, 75, 86, 93, 84)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Welch\uc758 t-\uac80\uc815\uc744 \uc218\ud589\ud558\uae30 \uc804\uc5d0 \uba3c\uc800<a href=\"https:\/\/statorials.org\/ko\/\u1109\u1161\u11bc\u110c\u1161-\u1109\u116e\u110b\u1167\u11b7\/\" target=\"_blank\" rel=\"noopener\">\uc0c1\uc790 \uadf8\ub9bc\uc744<\/a> \ub9cc\ub4e4\uc5b4 \uac01 \uadf8\ub8f9\uc758 \uc810\uc218 \ubd84\ud3ec\ub97c \uc2dc\uac01\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>boxplot(booklet, no_booklet, <span style=\"color: #3366ff;\">names<\/span> =c(\" <span style=\"color: #008000;\">Booklet<\/span> \",\" <span style=\"color: #008000;\">No Booklet<\/span> \"))\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11391 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/welchr1.png\" alt=\"R\uc758 Welch\uc758 t- \uac80\uc815\" width=\"386\" height=\"342\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">&#8220;\uc18c\ucc45\uc790&#8221; \uadf8\ub8f9\uc758 \ud3c9\uade0 \uc810\uc218\uac00 \ub354 \ub192\uace0 \uc810\uc218 \ud3b8\ucc28\uac00 \ub354 \ub0ae\ub2e4\ub294 \uac83\uc744 \ubd84\uba85\ud788 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uadf8\ub8f9 \uac04 \ud3c9\uade0 \uc810\uc218\uac00 \ud06c\uac8c \ub2e4\ub978\uc9c0 \uacf5\uc2dd\uc801\uc73c\ub85c \ud14c\uc2a4\ud2b8\ud558\uae30 \uc704\ud574 Welch\uc758 t-\ud14c\uc2a4\ud2b8\ub97c \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#perform Welch's t-test<\/span>\nt.test(booklet, no_booklet)\n\n\tWelch Two Sample t-test\n\ndata: booklet and no_booklet\nt = 2.2361, df = 14.354, p-value = 0.04171\nalternative hypothesis: true difference in means is not equal to 0\n95 percent confidence interval:\n  0.3048395 13.8618272\nsample estimates:\nmean of x mean of y \n 87.91667 80.83333 \n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\uacb0\uacfc\uc5d0\uc11c <em>t<\/em> \uac80\uc815 \ud1b5\uacc4\ub7c9\uc740 <strong>2.2361<\/strong> \uc774\uace0 \ud574\ub2f9 p-\uac12\uc740 <strong>0.04171<\/strong> \uc784\uc744 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc774 p-\uac12\uc740 0.05\ubcf4\ub2e4 \uc791\uc73c\ubbc0\ub85c \uadc0\ubb34 \uac00\uc124\uc744 \uae30\uac01\ud558\uace0 \ub450 \uadf8\ub8f9 \uac04\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218\uc5d0 \ud1b5\uacc4\uc801\uc73c\ub85c \uc720\uc758\ubbf8\ud55c \ucc28\uc774\uac00 \uc788\ub2e4\ub294 \uacb0\ub860\uc744 \ub0b4\ub9b4 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>t.test()<\/strong> \ud568\uc218\ub294 \ub2e4\uc74c \uc815\ubcf4\ub3c4 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">\ub450 \uadf8\ub8f9 \uac04\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218 \ucc28\uc774\uc5d0 \ub300\ud55c 95% \uc2e0\ub8b0 \uad6c\uac04\uc740 <strong>[0.3048, 13.8618<\/strong> ]\uc785\ub2c8\ub2e4.<\/span><\/li>\n<li> <span style=\"color: #000000;\">\uccab \ubc88\uc9f8 \uadf8\ub8f9\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218\ub294 <strong>87.91667<\/strong> \uc785\ub2c8\ub2e4.<\/span><\/li>\n<li> <span style=\"color: #000000;\">\ub450 \ubc88\uc9f8 \uadf8\ub8f9\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218\ub294 <strong>80.83333<\/strong> \uc785\ub2c8\ub2e4.<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\"><em>t.test() \ud568\uc218\uc5d0 \ub300\ud55c \uc804\uccb4 \ubb38\uc11c\ub294 <a href=\"https:\/\/www.rdocumentation.org\/packages\/stats\/versions\/3.6.2\/topics\/t.test\" target=\"_blank\" rel=\"noopener noreferrer\">\uc5ec\uae30\uc5d0\uc11c<\/a> \ucc3e\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/em><\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>\ucd94\uac00 \ub9ac\uc18c\uc2a4<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 R\uc5d0\uc11c \ub2e4\ub978 \uc77c\ubc18\uc801\uc778 \uc791\uc5c5\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/ko\/r\u110b\u1174-\u1109\u1162\u11b7\u1111\u1173\u11af-t-\u1110\u1166\u1109\u1173\u1110\u1173\/\" target=\"_blank\" rel=\"noopener\">R\uc5d0\uc11c \ub2e8\uc77c \ud45c\ubcf8 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95<\/a><br \/> <a href=\"https:\/\/statorials.org\/ko\/r\u110b\u1166\u1109\u1165-\u1103\u116e-\u1100\u1162\u110b\u1174-\u1109\u1162\u11b7\u1111\u1173\u11af-t-\u1110\u1166\u1109\u1173\u1110\u1173\/\" target=\"_blank\" rel=\"noopener\">R\uc5d0\uc11c 2-\ud45c\ubcf8 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95<\/a><br \/> <a href=\"https:\/\/statorials.org\/ko\/\u110a\u1161\u11bc\u110b\u1173\u11af-\u110b\u1175\u1105\u116e\u1102\u1173\u11ab-\u1111\u116d\u1107\u1169\u11ab-t-\u1100\u1165\u11b7\u110c\u1165\u11bc-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">R\uc5d0\uc11c \uc30d\uc744 \uc774\ub8e8\ub294 \uc0d8\ud50c t-\ud14c\uc2a4\ud2b8\ub97c \uc218\ud589\ud558\ub294 \ubc29\ubc95<\/a><br \/> <a href=\"https:\/\/statorials.org\/ko\/\u1103\u1161\u110c\u116e\u11bc-\u1109\u1161\u11bc\u110c\u1161-\u1100\u1173\u1105\u1175\u11b7-r\/\" target=\"_blank\" rel=\"noopener noreferrer\">R\uc758 \ub2e8\uc77c \uadf8\ub798\ud504\uc5d0 \uc5ec\ub7ec \uc0c1\uc790 \uadf8\ub9bc\uc744 \uadf8\ub9ac\ub294 \ubc29\ubc95<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Welch\uc758 t-\uac80\uc815\uc740 \ub450 \uadf8\ub8f9\uc758 \ubd84\uc0b0\uc774 \ub3d9\uc77c\ud558\ub2e4\uace0 \uac00\uc815\ub418\uc9c0 \uc54a\ub294 \uacbd\uc6b0 \ub450 \ub3c5\ub9bd \uadf8\ub8f9 \uac04\uc758 \ud3c9\uade0\uc744 \ube44\uad50\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. R\uc5d0\uc11c Welch\uc758 t-\ud14c\uc2a4\ud2b8\ub97c \uc218\ud589\ud558\ub824\uba74 \ub2e4\uc74c \uad6c\ubb38\uc744 \uc0ac\uc6a9\ud558\ub294 t.test() \ud568\uc218\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. t.test(x, y, Alternative = c(\u201c\ub450 \uc5bc\uad74\u201d, \u201c\uc801\uc74c\u201d, \u201c\ub354 \ud07c\u201d)) \uae08: x: \uccab \ubc88\uc9f8 \uadf8\ub8f9\uc5d0 \ub300\ud55c \ub370\uc774\ud130 \uac12\uc758 \uc22b\uc790\ud615 \ubca1\ud130 y: \ub450 \ubc88\uc9f8 \uadf8\ub8f9\uc5d0 \ub300\ud55c \ub370\uc774\ud130 \uac12\uc758 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-1128","post","type-post","status-publish","format-standard","hentry","category-20"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>R\uc5d0\uc11c Welch\uc758 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95 - 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