{"id":40792,"date":"2024-11-04T12:20:31","date_gmt":"2024-11-04T12:20:31","guid":{"rendered":"https:\/\/atmokpo.com\/w\/?p=40792"},"modified":"2024-11-26T06:38:26","modified_gmt":"2024-11-26T06:38:26","slug":"20-%ea%b0%80%ec%84%a4-%ea%b2%80%ec%a0%95hypothesis-testing-t-%ea%b2%80%ec%a0%95%ea%b3%bc-%ec%b9%b4%ec%9d%b4%ec%a0%9c%ea%b3%b1-%ea%b2%80%ec%a0%95%ec%9d%84-%ed%86%b5%ed%95%9c-%ea%b0%80%ec%84%a4","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/40792\/","title":{"rendered":"20.\uac00\uc124 \uac80\uc815(Hypothesis Testing), T-\uac80\uc815\uacfc \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc744 \ud1b5\ud55c \uac00\uc124 \uac80\uc815 \ubc29\ubc95"},"content":{"rendered":"<p>\uac00\uc124 \uac80\uc815(Hypothesis Testing)\uc740 \ud1b5\uacc4\ud559\uc5d0\uc11c \ubaa8\uc9d1\ub2e8\uc758 \ud2b9\uc815 \ud2b9\uc131\uc5d0 \ub300\ud55c \ucd08\uae30 \uac00\uc124\uc744 \uc124\uc815\ud558\uace0 \uc774\ub97c \uac80\uc99d\ud558\uae30 \uc704\ud55c \ubc29\ubc95\ub860\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc774 \uacfc\uc815\uc740 \ub370\uc774\ud130\ub97c \ud1b5\ud574 \uc5bb\uc740 \uacb0\uacfc\uac00 \uc6b0\uc5f0\uc5d0 \uc758\ud574 \ubc1c\uc0dd\ud588\ub294\uc9c0 \uc544\ub2c8\uba74 \uc2e4\uc81c\ub85c \uc758\ubbf8 \uc788\ub294 \ucc28\uc774\uac00 \uc788\ub294\uc9c0\ub97c \ud310\ub2e8\ud558\ub294 \ub370 \ud544\uc218\uc801\uc778 \ub3c4\uad6c\uac00 \ub429\ub2c8\ub2e4. \ubcf8 \uae00\uc5d0\uc11c\ub294 \uac00\uc124 \uac80\uc815\uc758 \uae30\ucd08 \uac1c\ub150\uacfc T-\uac80\uc815 \ubc0f \uce74\uc774\uc81c\uacf1 \uac80\uc815 \ubc29\ubc95\ub860\uc5d0 \ub300\ud574 \uae4a\uc774 \uc788\uac8c \ub2e4\ub904\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>1. \uac00\uc124 \uac80\uc815\uc758 \uae30\ucd08<\/h2>\n<p>\uac00\uc124 \uac80\uc815\uc740 \uac80\uc815\ud558\uace0\uc790 \ud558\ub294 \ub450 \uac00\uc9c0 \uac00\uc124, \uc989 \uadc0\ubb34\uac00\uc124(null hypothesis, H0)\uacfc \ub300\ub9bd\uac00\uc124(alternate hypothesis, H1)\uc744 \uc124\uc815\ud558\ub294 \uac83\uc73c\ub85c \uc2dc\uc791\ud569\ub2c8\ub2e4. \uadc0\ubb34\uac00\uc124\uc740 \uc77c\ubc18\uc801\uc73c\ub85c &#8216;\ubcc0\ud654\uac00 \uc5c6\ub2e4&#8217;\ub294 \uac00\uc815\uc744 \ud45c\ud604\ud558\uba70, \ub300\ub9bd\uac00\uc124\uc740 &#8216;\ubcc0\ud654\uac00 \uc788\ub2e4&#8217;\ub294 \uac83\uc744 \uc8fc\uc7a5\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc5b4\ub5a4 \uc2e0\uc57d\uc774 \uae30\uc874 \uc57d\ubcf4\ub2e4 \ud6a8\uacfc\uac00 \uc788\ub294\uc9c0\ub97c \uac80\uc99d\ud560 \ub54c, \uadc0\ubb34\uac00\uc124\uc740 &#8216;\uc2e0\uc57d\uc758 \ud6a8\uacfc\ub294 \uae30\uc874 \uc57d\uacfc \uac19\ub2e4&#8217;\ub294 \uac83\uc774\uace0 \ub300\ub9bd\uac00\uc124\uc740 &#8216;\uc2e0\uc57d\uc758 \ud6a8\uacfc\ub294 \uae30\uc874 \uc57d\ubcf4\ub2e4 \ub354 \ud06c\ub2e4&#8217;\uac00 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>1.1. \uac00\uc124 \uac80\uc815\uc758 \uacfc\uc815<\/h3>\n<p>\uac00\uc124 \uac80\uc815\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \ub2e8\uacc4\ub85c \uc9c4\ud589\ub429\ub2c8\ub2e4.<\/p>\n<ol>\n<li>\uac00\uc124 \uc124\uc815: \uadc0\ubb34\uac00\uc124(H0)\uacfc \ub300\ub9bd\uac00\uc124(H1)\uc744 \uc124\uc815\ud569\ub2c8\ub2e4.<\/li>\n<li>\uc720\uc758 \uc218\uc900 \uc124\uc815: \ubcf4\ud1b5 0.05, 0.01\uc758 \uac12\uc744 \uc0ac\uc6a9\ud558\uba70, \uc774\ub294 \uc624\ub958\uc758 \ud5c8\uc6a9 \uc218\uc900\uc744 \uacb0\uc815\ud569\ub2c8\ub2e4.<\/li>\n<li>\ud14c\uc2a4\ud2b8 \ud1b5\uacc4\ub7c9 \uacc4\uc0b0: \ub370\uc774\ud130\ub85c\ubd80\ud130 \uac80\uc815 \ud1b5\uacc4\ub7c9\uc744 \uacc4\uc0b0\ud569\ub2c8\ub2e4.<\/li>\n<li>\uc784\uacc4\uac12 \uacb0\uc815: \uc720\uc758 \uc218\uc900\uc5d0 \ub530\ub77c \uc784\uacc4\uac12\uc744 \uacb0\uc815\ud569\ub2c8\ub2e4.<\/li>\n<li>\uacb0\uc815: \ud14c\uc2a4\ud2b8 \ud1b5\uacc4\ub7c9\uacfc \uc784\uacc4\uac12\uc744 \ube44\uad50\ud558\uc5ec \uadc0\ubb34\uac00\uc124\uc744 \uae30\uac01\ud560 \uac83\uc778\uc9c0 \uc720\uc9c0\ud560 \uac83\uc778\uc9c0\ub97c \ud310\ub2e8\ud569\ub2c8\ub2e4.<\/li>\n<\/ol>\n<h2>2. T-\uac80\uc815(T-test)<\/h2>\n<p>T-\uac80\uc815\uc740 \ub450 \uadf8\ub8f9 \uac04\uc758 \ud3c9\uade0 \ucc28\uc774\ub97c \ube44\uad50\ud558\ub294 \ud1b5\uacc4\uc801 \ubc29\ubc95\uc73c\ub85c, \ub370\uc774\ud130\uac00 \uc815\uaddc \ubd84\ud3ec\ub97c \ub530\ub974\ub294 \uacbd\uc6b0\uc5d0 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. T-\uac80\uc815\uc740 \uc8fc\ub85c \uc138 \uac00\uc9c0 \uc720\ud615\uc73c\ub85c \ub098\ub258\uba70, \uac01 \uc720\ud615\uc740 \uc801\uc6a9\ub418\ub294 \uc0c1\ud669\uc774 \ub2e4\ub985\ub2c8\ub2e4.<\/p>\n<h3>2.1. \ub3c5\ub9bd\ud45c\ubcf8 T-\uac80\uc815 (Independent Samples T-test)<\/h3>\n<p>\ub3c5\ub9bd\ud45c\ubcf8 T-\uac80\uc815\uc740 \ub450 \uac1c\uc758 \uc11c\ub85c \ub3c5\ub9bd\uc801\uc778 \uc9d1\ub2e8\uc758 \ud3c9\uade0\uc744 \ube44\uad50\ud560 \ub54c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub450 \uac1c\uc758 \ub2e4\ub978 \ud559\uad50\uc5d0\uc11c \uc2dc\ud5d8 \uc810\uc218\ub97c \ube44\uad50\ud560 \ub54c \uc774 \uac80\uc815\uc744 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h4>\uac00\uc124 \uc124\uc815<\/h4>\n<p>\uadc0\ubb34\uac00\uc124(H0): \ub450 \uc9d1\ub2e8\uc758 \ud3c9\uade0\uc740 \uac19\ub2e4.<br \/>\n\ub300\ub9bd\uac00\uc124(H1): \ub450 \uc9d1\ub2e8\uc758 \ud3c9\uade0\uc740 \ub2e4\ub974\ub2e4.<\/p>\n<h4>\uacf5\uc2dd<\/h4>\n<p>\ub3c5\ub9bd\ud45c\ubcf8 T-\uac80\uc815\uc758 \uacf5\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<p>T = (M1 &#8211; M2) \/ SEM<\/p>\n<p>\uc5ec\uae30\uc11c M1\uacfc M2\ub294 \ub450 \uc9d1\ub2e8\uc758 \ud3c9\uade0, SEM\uc740 \ud45c\uc900 \uc624\ucc28\uc785\ub2c8\ub2e4.<\/p>\n<h4>\uc608\uc81c<\/h4>\n<p>\uac00\uc0c1\uc758 \ub370\uc774\ud130\ub85c \ub450 \uac1c\uc758 \uc9d1\ub2e8 A\uc640 B\uc758 \uc2dc\ud5d8 \uc810\uc218\uac00 \ub2e4\uc74c\uacfc \uac19\ub2e4\uace0 \uac00\uc815\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li>\uc9d1\ub2e8 A: 85, 90, 78, 92, 88<\/li>\n<li>\uc9d1\ub2e8 B: 80, 85, 84, 79, 83<\/li>\n<\/ul>\n<p>\uc9d1\ub2e8 A\uc640 B\uc758 \ud3c9\uade0\uacfc T-\uac80\uc815\uc744 \ud1b5\ud574 \uac00\uc124\uc744 \uac80\uc99d\ud558\ub294 \uacfc\uc815\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>2.2. \ub300\uc751\ud45c\ubcf8 T-\uac80\uc815 (Paired Sample T-test)<\/h3>\n<p>\ub300\uc751\ud45c\ubcf8 T-\uac80\uc815\uc740 \ub3d9\uc77c\ud55c \uc9d1\ub2e8\uc5d0\uc11c \ub450 \ubc88\uc758 \uce21\uc815\uc744 \ud560 \ub54c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ud2b9\uc815 \uce58\ub8cc\ub97c \ubc1b\uae30 \uc804\uacfc \ud6c4\uc758 \uccb4\uc911 \ubcc0\ud654\ub97c \ube44\uad50\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. <\/p>\n<h4>\uac00\uc124 \uc124\uc815<\/h4>\n<p>\uadc0\ubb34\uac00\uc124(H0): \uce58\ub8cc \uc804 \ud6c4 \uccb4\uc911\uc758 \ud3c9\uade0 \ucc28\uc774\ub294 \uc5c6\ub2e4.<br \/>\n\ub300\ub9bd\uac00\uc124(H1): \uce58\ub8cc \uc804 \ud6c4 \uccb4\uc911\uc758 \ud3c9\uade0 \ucc28\uc774\ub294 \uc788\ub2e4.<\/p>\n<h4>\uacf5\uc2dd<\/h4>\n<p>T = (D\u0304) \/ (SD \/ \u221an)<\/p>\n<p>\uc5ec\uae30\uc11c D\u0304\ub294 \ud3c9\uade0\uc758 \ucc28\uc774, SD\ub294 \ucc28\uc774\uc758 \ud45c\uc900\ud3b8\ucc28, n\uc740 \uad00\uce21\uce58\uc758 \uc218\uc785\ub2c8\ub2e4.<\/p>\n<h4>\uc608\uc81c<\/h4>\n<p>\ub2e4\uc74c\uc740 5\uba85\uc758 \ud658\uc790\uc5d0\uac8c\uc11c \uce58\ub8cc \uc804\ud6c4 \uccb4\uc911 \ub370\uc774\ud130\ub97c \ubcf4\uc5ec\uc90d\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\ud658\uc790 1: 75kg \u2192 70kg<\/li>\n<li>\ud658\uc790 2: 80kg \u2192 76kg<\/li>\n<li>\ud658\uc790 3: 78kg \u2192 77kg<\/li>\n<li>\ud658\uc790 4: 83kg \u2192 80kg<\/li>\n<li>\ud658\uc790 5: 90kg \u2192 85kg<\/li>\n<\/ul>\n<p>\uc774 \ub370\uc774\ud130\ub97c \uae30\ubc18\uc73c\ub85c \ud3c9\uade0 \uccb4\uc911 \ubcc0\ud654\uc640 T-\uac80\uc815\uc744 \uc801\uc6a9\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>2.3. \uc77c\ud45c\ubcf8 T-\uac80\uc815 (One-Sample T-test)<\/h3>\n<p>\uc77c\ud45c\ubcf8 T-\uac80\uc815\uc740 \ub2e8\uc77c \uc9d1\ub2e8\uc758 \ud3c9\uade0\uc774 \ud2b9\uc815 \uac12\uacfc \ub2e4\ub978\uc9c0\ub97c \uac80\uc815\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ud2b9\uc815 \uc218\uc5c5\uc5d0\uc11c \ud3c9\uade0 \uc810\uc218\uac00 75\uc810\uc778\uc9c0 \uac80\uc815\ud560 \ub54c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n<h4>\uac00\uc124 \uc124\uc815<\/h4>\n<p>\uadc0\ubb34\uac00\uc124(H0): \uc9d1\ub2e8 \ud3c9\uade0\uc740 75\uc774\ub2e4.<br \/>\n\ub300\ub9bd\uac00\uc124(H1): \uc9d1\ub2e8 \ud3c9\uade0\uc740 75\uac00 \uc544\ub2c8\ub2e4.<\/p>\n<h4>\uacf5\uc2dd<\/h4>\n<p>T = (M &#8211; \u03bc) \/ (SD \/ \u221an)<\/p>\n<p>\uc5ec\uae30\uc11c M\uc740 \uc9d1\ub2e8\uc758 \ud3c9\uade0, \u03bc\ub294 \ud2b9\uc815 \uac12(75), SD\ub294 \uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28, n\uc740 \uc0d8\ud50c \uc218\uc785\ub2c8\ub2e4.<\/p>\n<h4>\uc608\uc81c<\/h4>\n<p>\ub9cc\uc57d \ud559\uc0dd 10\uba85\uc758 \uc810\uc218\uac00 \uc544\ub798\uc640 \uac19\uc744 \ub54c:<\/p>\n<ul>\n<li>\uc810\uc218: 74, 76, 70, 78, 73, 75, 77, 80, 72, 73<\/li>\n<\/ul>\n<p>\uc774 \ub370\uc774\ud130\ub97c \uae30\ubc18\uc73c\ub85c \ud3c9\uade0 \uc810\uc218\uc640 T-\uac80\uc815\uc744 \uc218\ud589\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>3. \uce74\uc774\uc81c\uacf1 \uac80\uc815 (Chi-Square Test)<\/h2>\n<p>\uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \uc8fc\ub85c \uba85\ubaa9\ud615 \ub370\uc774\ud130, \uc989 \ubc94\uc8fc\ud615 \ub370\uc774\ud130\ub97c \ub2e4\ub8e8\ub294 \ud1b5\uacc4 \uae30\ubc95\uc73c\ub85c, \uad00\ucc30\ub41c \ube48\ub3c4\uc640 \uae30\ub300 \ube48\ub3c4\ub97c \ube44\uad50\ud558\uc5ec \ub450 \ubcc0\uc218 \uac04\uc758 \ub3c5\ub9bd\uc131\uc744 \uac80\uc99d\ud569\ub2c8\ub2e4. \uac00\uc7a5 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \uce74\uc774\uc81c\uacf1 \ub3c5\ub9bd\uc131 \uac80\uc815(Chi-Square Test of Independence)\uc785\ub2c8\ub2e4.<\/p>\n<h3>3.1. \uce74\uc774\uc81c\uacf1 \ub3c5\ub9bd\uc131 \uac80\uc815<\/h3>\n<p>\uce74\uc774\uc81c\uacf1 \ub3c5\ub9bd\uc131 \uac80\uc815\uc740 \ub450 \ubc94\uc8fc\ud615 \ubcc0\uc218 \uac04\uc758 \uad00\uacc4\ub97c \uac80\uc815\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc131\ubcc4\uacfc \ud761\uc5f0 \uc5ec\ubd80 \uac04\uc758 \uad00\uacc4\ub97c \uc870\uc0ac\ud560 \ub54c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n<h4>\uac00\uc124 \uc124\uc815<\/h4>\n<p>\uadc0\ubb34\uac00\uc124(H0): \ub450 \ubcc0\uc218\ub294 \ub3c5\ub9bd\uc801\uc774\ub2e4.<br \/>\n\ub300\ub9bd\uac00\uc124(H1): \ub450 \ubcc0\uc218\ub294 \ub3c5\ub9bd\uc801\uc774\uc9c0 \uc54a\ub2e4.<\/p>\n<h4>\uacf5\uc2dd<\/h4>\n<p>\uce74\uc774\uc81c\uacf1 \ud1b5\uacc4\ub7c9\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4:<\/p>\n<p>\u03c7\u00b2 = \u03a3((O &#8211; E)\u00b2 \/ E)<\/p>\n<p>\uc5ec\uae30\uc11c O\ub294 \uad00\ucc30 \ube48\ub3c4, E\ub294 \uae30\ub300 \ube48\ub3c4\uc785\ub2c8\ub2e4.<\/p>\n<h4>\uc608\uc81c<\/h4>\n<p>\uc544\ub798\uc640 \uac19\uc740 \ub370\uc774\ud130\uac00 \uc788\uc744 \ub54c, \uc131\ubcc4\uc5d0 \ub530\ub978 \ud761\uc5f0 \uc5ec\ubd80\ub97c \uac80\uc815\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4:<\/p>\n<table>\n<tr>\n<th>\uc131\ubcc4<\/th>\n<th>\ud761\uc5f0<\/th>\n<th>\ube44\ud761\uc5f0<\/th>\n<\/tr>\n<tr>\n<td>\ub0a8\uc131<\/td>\n<td>30<\/td>\n<td>70<\/td>\n<\/tr>\n<tr>\n<td>\uc5ec\uc131<\/td>\n<td>10<\/td>\n<td>90<\/td>\n<\/tr>\n<\/table>\n<p>\uc774 \ub370\uc774\ud130\ub97c \uc0ac\uc6a9\ud558\uc5ec \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc744 \uc218\ud589\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>4. \uacb0\ub860<\/h2>\n<p>\uac00\uc124 \uac80\uc815\uc740 \ud1b5\uacc4\uc801 \ubd84\uc11d\uc5d0 \uc788\uc5b4\uc11c \ud544\uc218\uc801\uc778 \uacfc\uc815\uc73c\ub85c, T-\uac80\uc815\uacfc \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \uadf8 \uc911\uc5d0\uc11c\ub3c4 \uac00\uc7a5 \ub110\ub9ac \uc0ac\uc6a9\ub418\ub294 \ubc29\ubc95\ub860\uc785\ub2c8\ub2e4. \uac01\uac01\uc758 \uac80\uc815\uc740 \ud2b9\uc815\ud55c \uc0c1\ud669\uc5d0 \ub9de\uac8c \uc120\ud0dd\ub418\uc5b4\uc57c \ud558\uba70, \uc62c\ubc14\ub978 \ubd84\uc11d\uc744 \uc704\ud574\uc11c\ub294 \ub370\uc774\ud130\uc758 \ud2b9\uc131\uacfc \uac00\uc124 \uc124\uc815\uc774 \uc911\uc694\ud569\ub2c8\ub2e4. \ub370\uc774\ud130 \uc218\uc9d1 \ubc0f \ucc98\ub9ac \ud6c4, \uc801\uc808\ud55c \uac80\uc815 \ubc29\ubc95\uc744 \uc120\ud0dd\ud558\uace0 \ud574\uc11d\ud558\ub294 \uac83\uc774 \ud1b5\uacc4\uc801 \ubd84\uc11d\uc758 \ud575\uc2ec\uc785\ub2c8\ub2e4. \uc774 \uae00\uc744 \ud1b5\ud574 \uac00\uc124 \uac80\uc815\uc758 \uae30\ucd08\uc640 T-\uac80\uc815, \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc758 \uc6d0\ub9ac\uc5d0 \ub300\ud574 \uc774\ud574\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub418\uc5c8\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uac00\uc124 \uac80\uc815(Hypothesis Testing)\uc740 \ud1b5\uacc4\ud559\uc5d0\uc11c \ubaa8\uc9d1\ub2e8\uc758 \ud2b9\uc815 \ud2b9\uc131\uc5d0 \ub300\ud55c \ucd08\uae30 \uac00\uc124\uc744 \uc124\uc815\ud558\uace0 \uc774\ub97c \uac80\uc99d\ud558\uae30 \uc704\ud55c \ubc29\ubc95\ub860\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. 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