{"id":608,"date":"2023-07-29T08:22:21","date_gmt":"2023-07-29T08:22:21","guid":{"rendered":"https:\/\/statorials.org\/ko\/%e1%84%8a%e1%85%a1%e1%86%bc%e1%84%8b%e1%85%b3%e1%86%af-%e1%84%8b%e1%85%b5%e1%84%85%e1%85%ae%e1%84%82%e1%85%b3%e1%86%ab-%e1%84%89%e1%85%a2%e1%86%b7%e1%84%91%e1%85%b3%e1%86%af-t-%e1%84%90%e1%85%a6\/"},"modified":"2023-07-29T08:22:21","modified_gmt":"2023-07-29T08:22:21","slug":"%e1%84%8a%e1%85%a1%e1%86%bc%e1%84%8b%e1%85%b3%e1%86%af-%e1%84%8b%e1%85%b5%e1%84%85%e1%85%ae%e1%84%82%e1%85%b3%e1%86%ab-%e1%84%89%e1%85%a2%e1%86%b7%e1%84%91%e1%85%b3%e1%86%af-t-%e1%84%90%e1%85%a6","status":"publish","type":"post","link":"https:\/\/statorials.org\/ko\/%e1%84%8a%e1%85%a1%e1%86%bc%e1%84%8b%e1%85%b3%e1%86%af-%e1%84%8b%e1%85%b5%e1%84%85%e1%85%ae%e1%84%82%e1%85%b3%e1%86%ab-%e1%84%89%e1%85%a2%e1%86%b7%e1%84%91%e1%85%b3%e1%86%af-t-%e1%84%90%e1%85%a6\/","title":{"rendered":"Stata\uc5d0\uc11c \uc30d\uc744 \uc774\ub8e8\ub294 \ud45c\ubcf8 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95"},"content":{"rendered":"

<\/p>\n

\n

\uc30d\ud45c\ubcf8 t-\uac80\uc815\uc740<\/strong><\/a> \ud55c \ud45c\ubcf8\uc758 \uac01 \uad00\uce21\uce58\uac00 \ub2e4\ub978 \ud45c\ubcf8\uc758 \uad00\uce21\uce58\uc640 \uc5f0\uad00\ub420 \uc218 \uc788\ub294 \uacbd\uc6b0 \ub450 \ud45c\ubcf8\uc758 \ud3c9\uade0\uc744 \ube44\uad50\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/span><\/p>\n

\uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 Stata\uc5d0\uc11c \uc30d\uc744 \uc774\ub8e8\ub294 \ud45c\ubcf8 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4.<\/span><\/p>\n

\uc608: Stata\uc758 \ub300\uc751\ud45c\ubcf8 t-\uac80\uc815<\/strong><\/span><\/h2>\n

\uc5f0\uad6c\uc790\ub4e4\uc740 \uc0c8\ub85c\uc6b4 \uc5f0\ub8cc \ucc98\ub9ac\ub85c \uc778\ud574 \ud2b9\uc815 \uc790\ub3d9\ucc28\uc758 \ud3c9\uade0 mpg\uac00 \ubcc0\uacbd\ub418\ub294\uc9c0 \uc54c\uace0 \uc2f6\uc5b4\ud569\ub2c8\ub2e4. \uc774\ub97c \ud14c\uc2a4\ud2b8\ud558\uae30 \uc704\ud574 \uadf8\ub4e4\uc740 \uc5f0\ub8cc \ucc98\ub9ac\uac00 \uc788\ub294 \ucc28\ub7c9\uacfc \uc5c6\ub294 \ucc28\ub7c9 12\ub300\uc758 mpg\ub97c \uce21\uc815\ud558\ub294 \uc2e4\ud5d8\uc744 \uc218\ud589\ud569\ub2c8\ub2e4.<\/span><\/p>\n

\uac01 \uc790\ub3d9\ucc28\ub294 \ucc98\ub9ac\ub97c \ubc1b\uc558\uae30 \ub54c\ubb38\uc5d0 \uac01 \uc790\ub3d9\ucc28\ub97c \uc790\uccb4\uc801\uc73c\ub85c \ud398\uc5b4\ub9c1\ud558\uc5ec<\/span> \uc5f0\ub8cc \ucc98\ub9ac \uc720\ubb34\uc5d0 \ub530\ub978 \ud3c9\uade0 mpg\uc5d0 \ucc28\uc774\uac00 \uc788\ub294\uc9c0 \ud655\uc778\ud558\ub294 \ub300\uc751 t-\ud14c\uc2a4\ud2b8\ub97c \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n

Stata\uc5d0\uc11c \ub300\uc751 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub824\uba74 \ub2e4\uc74c \ub2e8\uacc4\ub97c \uc644\ub8cc\ud558\uc138\uc694.<\/span><\/p>\n

1\ub2e8\uacc4: \ub370\uc774\ud130\ub97c \ub85c\ub4dc\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n

\uba3c\uc800 \uba85\ub839 \uc0c1\uc790\uc5d0 use https:\/\/www.stata-press.com\/data\/r13\/fuel\uc744<\/strong> \uc785\ub825\ud558\uace0 Enter\ub97c \ud074\ub9ad\ud558\uc5ec \ub370\uc774\ud130\ub97c \ub85c\ub4dc\ud569\ub2c8\ub2e4.<\/span> <\/p>\n

\"\uc6f9\uc5d0\uc11c<\/p>\n

2 \ub2e8\uacc4<\/strong> : \uc6d0\uc2dc \ub370\uc774\ud130\ub97c \ubd05\ub2c8\ub2e4.<\/strong><\/span><\/p>\n

paired t-test\ub97c \uc218\ud589\ud558\uae30 \uc804\uc5d0 \uba3c\uc800 \uc6d0\uc2dc \ub370\uc774\ud130\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc0c1\ub2e8 \uba54\ub274\ubc14\uc5d0\uc11c \ub370\uc774\ud130 > \ub370\uc774\ud130 \ud3b8\uc9d1\uae30 > \ub370\uc774\ud130 \ud3b8\uc9d1\uae30(\ucc3e\uc544\ubcf4\uae30)<\/strong> \ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4. \uccab \ubc88\uc9f8 \uc5f4 mpg1<\/em> \uc740 \uc5f0\ub8cc\ub97c \ucc98\ub9ac\ud558\uc9c0 \uc54a\uc740 \uccab \ubc88\uc9f8 \uc790\ub3d9\ucc28\uc758 mpg\ub97c \ud45c\uc2dc\ud558\uace0, \ub450 \ubc88\uc9f8 \uc5f4 mpg2<\/em> \ub294 \uc5f0\ub8cc\ub97c \ucc98\ub9ac\ud55c \uccab \ubc88\uc9f8 \uc790\ub3d9\ucc28\uc758 mpg\ub97c \ud45c\uc2dc\ud569\ub2c8\ub2e4.<\/span> <\/p>\n

\"Stata\uc758<\/p>\n

3\ub2e8\uacc4: \ub300\uc751 t-\uac80\uc815\uc744 \uc218\ud589\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n

\uc0c1\ub2e8 \uba54\ub274 \ud45c\uc2dc\uc904\uc5d0\uc11c \ud1b5\uacc4 > \uc694\uc57d, \ud45c \ubc0f \uac80\uc815 > \uace0\uc804 \uac00\uc124 \uac80\uc815 > t-\uac80\uc815(\ud3c9\uade0 \ube44\uad50 \uac80\uc815)<\/strong> \uc73c\ub85c \uc774\ub3d9\ud569\ub2c8\ub2e4.<\/span><\/p>\n

\ud398\uc5b4\ub9c1\uc744 \uc120\ud0dd\ud569\ub2c8\ub2e4.<\/em> \uccab \ubc88\uc9f8 \ubcc0\uc218\ub85c mpg1 \uc744<\/em> \uc120\ud0dd\ud569\ub2c8\ub2e4. \ub450 \ubc88\uc9f8 \ubcc0\uc218\ub85c mpg2 \ub97c<\/em> \uc120\ud0dd\ud569\ub2c8\ub2e4. \uc2e0\ub8b0 \uc218\uc900\uc5d0\uc11c \uc6d0\ud558\ub294 \uc218\uc900\uc744 \uc120\ud0dd\ud569\ub2c8\ub2e4. \uac12 95\ub294 \uc720\uc758 \uc218\uc900 0.05\uc5d0 \ud574\ub2f9\ud569\ub2c8\ub2e4. \uc774\uac83\uc744 95\ub85c \ub450\uaca0\uc2b5\ub2c8\ub2e4. \ub9c8\uc9c0\ub9c9\uc73c\ub85c OK \ub97c<\/em> \ud074\ub9ad\ud569\ub2c8\ub2e4.<\/span> <\/p>\n

\"Stata\uc758<\/p>\n

\uc30d\uc744 \uc774\ub8e8\ub294 t-\uac80\uc815 \uacb0\uacfc\uac00 \ud45c\uc2dc\ub429\ub2c8\ub2e4.<\/span> <\/p>\n

\"Stata\uc5d0\uc11c<\/p>\n

\uc6b0\ub9ac\ub294 \uac01 \uadf8\ub8f9\uc5d0 \ub300\ud574 \ub2e4\uc74c \uc815\ubcf4\ub97c \ubc1b\uc2b5\ub2c8\ub2e4:<\/span><\/p>\n

Obs:<\/strong> \uad00\ucc30 \ud69f\uc218\uc785\ub2c8\ub2e4. \uac01 \uadf8\ub8f9\uc5d0\ub294 12\uac1c\uc758 \uad00\uce21\uce58\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n

\ud3c9\uade0:<\/strong> \ud3c9\uade0 mpg\uc785\ub2c8\ub2e4. \uadf8\ub8f9 0\uc758 \ud3c9\uade0\uc740 21\uc785\ub2c8\ub2e4. \uadf8\ub8f9 1\uc758 \ud3c9\uade0\uc740 22.75\uc785\ub2c8\ub2e4.<\/span><\/p>\n

\uae30\uc900. Err:<\/strong> \ud45c\uc900 \uc624\ucc28, \u03c3 \/ \u221an<\/span> \uc73c\ub85c \uacc4\uc0b0\ub428<\/span><\/p>\n

\uae30\uc900. Dev:<\/strong> mpg\uc758 \ud45c\uc900\ud3b8\ucc28.<\/span><\/p>\n

95% \ud68c\uc758 \ubc94\uc704:<\/strong> \uc2e4\uc81c \uc778\uad6c \ud3c9\uade0(mpg)\uc5d0 \ub300\ud55c 95% \uc2e0\ub8b0 \uad6c\uac04\uc785\ub2c8\ub2e4.<\/span><\/p>\n

t:<\/strong> \ub300\uc751 t \uac80\uc815\uc758 \uac80\uc815 \ud1b5\uacc4\ub7c9\uc785\ub2c8\ub2e4.<\/span><\/p>\n

\uc790\uc720\ub3c4:<\/strong> \ud14c\uc2a4\ud2b8\uc5d0 \uc0ac\uc6a9\ud560 \uc790\uc720\ub3c4\uc774\uba70 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4: #pairs-1 = 12-1 = 11.<\/span><\/p>\n

\uc138 \uac00\uc9c0 \uc11c\ub85c \ub2e4\ub978 2-\ud45c\ubcf8 t-\uac80\uc815\uc5d0 \ub300\ud55c p-\uac12\uc774 \uacb0\uacfc \ud558\ub2e8\uc5d0 \ud45c\uc2dc\ub429\ub2c8\ub2e4. \ub2e8\uc21c\ud788 \ub450 \uadf8\ub8f9 \uac04\uc758 \ud3c9\uade0 mpg\uac00 \ub2e4\ub978\uc9c0 \uc54c\uace0 \uc2f6\uae30 \ub54c\ubb38\uc5d0 p-\uac12\uc774 0.0463\uc778 \uc911\uac04 \ud14c\uc2a4\ud2b8(\ub300\ub9bd \uac00\uc124\uc740 Ha:diff !=0)\uc758 \uacb0\uacfc\ub97c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/strong> .<\/span><\/p>\n

\uc774 \uac12\uc740 \uc720\uc758 \uc218\uc900\uc778 0.05\ubcf4\ub2e4 \ub0ae\uc73c\ubbc0\ub85c \uadc0\ubb34 \uac00\uc124\uc744 \uae30\uac01\ud569\ub2c8\ub2e4. \uc6b0\ub9ac\ub294 \ub450 \uadf8\ub8f9 \uc0ac\uc774\uc758 \uc2e4\uc81c \ud3c9\uade0 mpg\uac00 \ub2e4\ub974\ub2e4\uace0 \ub9d0\ud560 \uc218 \uc788\ub294 \ucda9\ubd84\ud55c \uc99d\uac70\ub97c \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n

5\ub2e8\uacc4: \uacb0\uacfc\ub97c \ubcf4\uace0\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n

\ub9c8\uc9c0\ub9c9\uc73c\ub85c paired t test \uacb0\uacfc\ub97c \ubcf4\uace0\ud558\uaca0\uc2b5\ub2c8\ub2e4. \uc774\ub97c \uc218\ud589\ud558\ub294 \ubc29\ubc95\uc758 \uc608\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n

\n

\uc0c8\ub85c\uc6b4 \uc5f0\ub8cc \ucc98\ub9ac\ub85c \uc778\ud574 \uac24\ub7f0\ub2f9 \ud3c9\uade0 \ub9c8\uc77c\uc758 \ucc28\uc774\uac00 \ubc1c\uc0dd\ud558\ub294\uc9c0 \ud655\uc778\ud558\uae30 \uc704\ud574 12\ub300\uc758 \uc790\ub3d9\ucc28\uc5d0 \ub300\ud574 \ub300\uc751 t-\ud14c\uc2a4\ud2b8\ub97c \uc218\ud589\ud588\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n

\uacb0\uacfc\ub294 \ud3c9\uade0 mpg\uac00 \ud1b5\uacc4\uc801\uc73c\ub85c \uc720\uc758\ubbf8\ud55c \uac83\uc73c\ub85c \ub098\ud0c0\ub0ac\uc2b5\ub2c8\ub2e4.  <\/em> \uc720\uc758 \uc218\uc900 0.05\uc5d0\uc11c \ub450 \uadf8\ub8f9(t = -2.2444, df=11, p = 0.0463) \uac04\uc5d0 \ucc28\uc774\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n

\ubaa8\uc9d1\ub2e8 \ud3c9\uade0 \uac04\uc758 \uc2e4\uc81c \ucc28\uc774\uc5d0 \ub300\ud55c 95% \uc2e0\ub8b0 \uad6c\uac04\uc740 (-3.466, -0.034)\uc758 \uad6c\uac04\uc744 \uc0b0\ucd9c\ud588\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n

\uc774\ub7ec\ud55c \uacb0\uacfc\ub97c \ubc14\ud0d5\uc73c\ub85c \uc0c8\ub85c\uc6b4 \uc5f0\ub8cc \ucc98\ub9ac\ub85c \uc778\ud574 \uc790\ub3d9\ucc28\uc758 mpg\uac00 \ud1b5\uacc4\uc801\uc73c\ub85c \uc0c1\ub2f9\ud788 \ub192\uc544\uc84c\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"

\uc30d\ud45c\ubcf8 t-\uac80\uc815\uc740 \ud55c \ud45c\ubcf8\uc758 \uac01 \uad00\uce21\uce58\uac00 \ub2e4\ub978 \ud45c\ubcf8\uc758 \uad00\uce21\uce58\uc640 \uc5f0\uad00\ub420 \uc218 \uc788\ub294 \uacbd\uc6b0 \ub450 \ud45c\ubcf8\uc758 \ud3c9\uade0\uc744 \ube44\uad50\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 Stata\uc5d0\uc11c \uc30d\uc744 \uc774\ub8e8\ub294 \ud45c\ubcf8 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4. \uc608: Stata\uc758 \ub300\uc751\ud45c\ubcf8 t-\uac80\uc815 \uc5f0\uad6c\uc790\ub4e4\uc740 \uc0c8\ub85c\uc6b4 \uc5f0\ub8cc \ucc98\ub9ac\ub85c \uc778\ud574 \ud2b9\uc815 \uc790\ub3d9\ucc28\uc758 \ud3c9\uade0 mpg\uac00 \ubcc0\uacbd\ub418\ub294\uc9c0 \uc54c\uace0 \uc2f6\uc5b4\ud569\ub2c8\ub2e4. \uc774\ub97c \ud14c\uc2a4\ud2b8\ud558\uae30 \uc704\ud574 \uadf8\ub4e4\uc740 \uc5f0\ub8cc \ucc98\ub9ac\uac00 \uc788\ub294 \ucc28\ub7c9\uacfc \uc5c6\ub294 \ucc28\ub7c9 […]<\/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-608","post","type-post","status-publish","format-standard","hentry","category-20"],"yoast_head":"\nStata\uc5d0\uc11c \uc30d\uc744 \uc774\ub8e8\ub294 \ud45c\ubcf8 t-\uac80\uc815\uc744 \uc218\ud589\ud558\ub294 \ubc29\ubc95 - 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