{"id":40766,"date":"2024-11-04T12:20:20","date_gmt":"2024-11-04T12:20:20","guid":{"rendered":"https:\/\/atmokpo.com\/w\/?p=40766"},"modified":"2024-11-26T06:38:30","modified_gmt":"2024-11-26T06:38:30","slug":"31-%ec%b9%b4%ec%9d%b4%ec%a0%9c%ea%b3%b1-%ea%b2%80%ec%a0%95chi-square-test-%ec%b9%b4%ec%9d%b4%ec%a0%9c%ea%b3%b1-%ea%b2%80%ec%a0%95%ec%9d%84-%ec%9d%b4%ec%9a%a9%ed%95%9c-%eb%8f%85%eb%a6%bd%ec%84%b1","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/40766\/","title":{"rendered":"31.\uce74\uc774\uc81c\uacf1 \uac80\uc815(Chi-Square Test), \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc744 \uc774\uc6a9\ud55c \ub3c5\ub9bd\uc131 \uac80\uc815"},"content":{"rendered":"<article>\n<header>\n<p>\uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \ud1b5\uacc4\ud559\uc5d0\uc11c \ube48\ub3c4 \ub370\uc774\ud130\uc758 \uad00\ucc30\uac12\uacfc \uae30\ub300\uac12 \uac04\uc758 \ucc28\uc774\ub97c \ube44\uad50\ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \ube44\ubaa8\uc218\uc801 \uac80\uc815 \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc8fc\ub85c \ubc94\uc8fc\ud615 \ub370\uc774\ud130\uc5d0\uc11c \ub450 \ubcc0\uc218 \uac04\uc758 \ub3c5\ub9bd\uc131\uc744 \uac80\ud1a0\ud558\ub294 \ub370 \ud65c\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n<\/header>\n<section>\n<h2>1. \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc758 \uae30\ubcf8 \uac1c\ub150<\/h2>\n<p>\uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \ub450 \uac1c \uc774\uc0c1\uc758 \ubc94\uc8fc\ud615 \ubcc0\uc218\uac00 \uc11c\ub85c \ub3c5\ub9bd\uc801\uc778\uc9c0\ub97c \ud310\ub2e8\ud558\uae30 \uc704\ud55c \ud1b5\uacc4\uc801 \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc8fc\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uc0c1\ud669\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\ub450 \ubc94\uc8fc\ud615 \ubcc0\uc218 \uac04\uc758 \uad00\uacc4\ub97c \uc54c\uc544\ubcf4\uace0 \uc2f6\uc744 \ub54c<\/li>\n<li>\uc124\ubb38\uc870\uc0ac \ub610\ub294 \uc2e4\ud5d8\uacb0\uacfc\uc5d0\uc11c \uad00\ucc30\ub41c \ube48\ub3c4\uc640 \uae30\ub300 \ube48\ub3c4\uc758 \ucc28\uc774\ub97c \ubd84\uc11d\ud558\uace0 \uc2f6\uc744 \ub54c<\/li>\n<\/ul>\n<p>\uce74\uc774\uc81c\uacf1 \uac80\uc815\uc758 \ud575\uc2ec \uc544\uc774\ub514\uc5b4\ub294 \uad00\ucc30\ub41c \ube48\ub3c4\uc640 \uae30\ub300 \ube48\ub3c4 \uac04\uc758 \ucc28\uc774\ub97c \uacc4\uc0b0\ud558\uace0 \uc774 \ucc28\uc774\uac00 \uc6b0\uc5f0\uc5d0 \uc758\ud55c \uac83\uc778\uc9c0 \uc544\ub2cc\uc9c0\ub97c \ud310\ub2e8\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ub450 \ubcc0\uc218 \uac04\uc758 \ub3c5\ub9bd\uc131\uc744 \uac80\ud1a0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/section>\n<section>\n<h2>2. \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc758 \uc720\ud615<\/h2>\n<p>\uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \uc77c\ubc18\uc801\uc73c\ub85c \ub450 \uac00\uc9c0 \uc8fc\uc694 \uc720\ud615\uc73c\ub85c \ub098\ub204\uc5b4\uc9d1\ub2c8\ub2e4:<\/p>\n<ul>\n<li><strong>\uce74\uc774\uc81c\uacf1 \ub3c5\ub9bd\uc131 \uac80\uc815 (Chi-Square Test of Independence)<\/strong>: \ub450 \ubc94\uc8fc\ud615 \ubcc0\uc218 \uac04\uc758 \ub3c5\ub9bd\uc131\uc744 \ud14c\uc2a4\ud2b8\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\uce74\uc774\uc81c\uacf1 \uc801\ud569\ub3c4 \uac80\uc815 (Chi-Square Goodness of Fit Test)<\/strong>: \ub2e8\uc77c \ubc94\uc8fc\ud615 \ubcc0\uc218\uc758 \ubd84\ud3ec\uac00 \ud2b9\uc815 \ubd84\ud3ec\uc640 \uc77c\uce58\ud558\ub294\uc9c0\ub97c \ud14c\uc2a4\ud2b8\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<\/section>\n<section>\n<h2>3. \uce74\uc774\uc81c\uacf1 \ub3c5\ub9bd\uc131 \uac80\uc815<\/h2>\n<p>\uce74\uc774\uc81c\uacf1 \ub3c5\ub9bd\uc131 \uac80\uc815\uc758 \uc8fc\ub41c \ubaa9\uc801\uc740 \ub450 \ubc94\uc8fc\ud615 \ubcc0\uc218 \uac04\uc758 \uad00\uacc4\ub97c \ud0d0\uad6c\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc131\ubcc4(\ub0a8\uc131\/\uc5ec\uc131)\uacfc \ud761\uc5f0 \uc5ec\ubd80(\ud761\uc5f0\/\ube44\ud761\uc5f0) \uac04\uc758 \ub3c5\ub9bd\uc131\uc744 \ubd84\uc11d\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ub450 \ubcc0\uc218 \uac04\uc758 \uc0c1\uad00\uad00\uacc4\uac00 \uc788\ub294\uc9c0 \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc774 \uac80\uc815\uc758 \uc218\ud559\uc801 \uac00\uc815\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\ub370\uc774\ud130\ub294 \ub3c5\ub9bd\uc801\uc774\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/li>\n<li>\uac01 \uc140\uc758 \uae30\ub300 \ube48\ub3c4\ub294 5 \uc774\uc0c1\uc774\uc5b4\uc57c \ud558\uba70, \uadf8\ub807\uc9c0 \uc54a\uc740 \uacbd\uc6b0\uc5d0\ub294 \uacb0\uacfc\uac00 \uc2e0\ub8b0\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>3.1. \uce74\uc774\uc81c\uacf1 \ud1b5\uacc4\ub7c9 \uacc4\uc0b0<\/h3>\n<p>\uce74\uc774\uc81c\uacf1 \ub3c5\ub9bd\uc131 \uac80\uc815\uc5d0\uc11c \uce74\uc774\uc81c\uacf1 \ud1b5\uacc4\ub7c9(\u03c7\u00b2)\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4:<\/p>\n<p>\u03c7\u00b2 = \u2211((O\u1d62 &#8211; E\u1d62)\u00b2 \/ E\u1d62)<\/p>\n<p>\uc5ec\uae30\uc11c O\u1d62\ub294 \uad00\ucc30 \ube48\ub3c4, E\u1d62\ub294 \uae30\ub300 \ube48\ub3c4\uc785\ub2c8\ub2e4. \uc774 \uac12\uc774 \ud074\uc218\ub85d \ub450 \ubcc0\uc218 \uac04\uc758 \ub3c5\ub9bd\uc131\uc5d0 \ub300\ud55c \uac00\uc124\uc774 \uae30\uac01\ub420 \uac00\ub2a5\uc131\uc774 \ub192\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>3.2. \uae30\ub300 \ube48\ub3c4 \uacc4\uc0b0<\/h3>\n<p>\uae30\ub300 \ube48\ub3c4\ub294 \uac01 \uc140\uc758 \uad00\ucc30 \ube48\ub3c4\ub97c \uae30\ubc18\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4:<\/p>\n<p>E = (\ud589 \ucd1d\ud569 \u00d7 \uc5f4 \ucd1d\ud569) \/ \uc804\uccb4 \uc0d8\ud50c \ud06c\uae30<\/p>\n<p>\uae30\ub300 \ube48\ub3c4\uac00 \uc791\uc744\uc218\ub85d \uad00\ucc30\ub41c \ube48\ub3c4\uc640\uc758 \ucc28\uc774\uac00 \ud074 \uac00\ub2a5\uc131\uc774 \ub192\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>3.3. \uc720\uc758\uc131 \uac80\uc815<\/h3>\n<p>\uce74\uc774\uc81c\uacf1 \ud1b5\uacc4\ub7c9\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc720\uc758\uc131\uc744 \ud3c9\uac00\ud569\ub2c8\ub2e4. \uc8fc\uc5b4\uc9c4 \uc720\uc758\uc218\uc900(\ubcf4\ud1b5 0.05)\uacfc \uc790\uc720\ub3c4\uc5d0 \ub530\ub77c p-\uac12\uc744 \ud655\uc778\ud558\uace0, p-\uac12\uc774 \uc720\uc758\uc218\uc900\ubcf4\ub2e4 \uc791\uc73c\uba74 \uadc0\ubb34\uac00\uc124(H\u2080: \ub450 \ubcc0\uc218\ub294 \ub3c5\ub9bd\uc774\ub2e4)\uc744 \uae30\uac01\ud558\uace0, \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 \ucc44\ud0dd\ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n<section>\n<h2>4. \uc608\uc2dc: \uce74\uc774\uc81c\uacf1 \ub3c5\ub9bd\uc131 \uac80\uc815<\/h2>\n<p>\uac00\uc815\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \ud55c \uc870\uc0ac\uc5d0\uc11c \ub0a8\uc131\uacfc \uc5ec\uc131 \uac01 100\uba85\uc5d0\uac8c \ud761\uc5f0 \uc5ec\ubd80\ub97c \ubb3c\uc5c8\uc2b5\ub2c8\ub2e4. \uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<table>\n<thead>\n<tr>\n<th>\uc131\ubcc4<\/th>\n<th>\ud761\uc5f0<\/th>\n<th>\ube44\ud761\uc5f0<\/th>\n<th>\ud569\uacc4<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\ub0a8\uc131<\/td>\n<td>40<\/td>\n<td>60<\/td>\n<td>100<\/td>\n<\/tr>\n<tr>\n<td>\uc5ec\uc131<\/td>\n<td>25<\/td>\n<td>75<\/td>\n<td>100<\/td>\n<\/tr>\n<tr>\n<td>\ud569\uacc4<\/td>\n<td>65<\/td>\n<td>135<\/td>\n<td>200<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>4.1. \uae30\ub300 \ube48\ub3c4 \uacc4\uc0b0<\/h3>\n<p>\uac01 \uc140\uc5d0 \ub300\ud55c \uae30\ub300 \ube48\ub3c4\ub97c \uacc4\uc0b0\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\ub0a8\uc131 \ud761\uc5f0: (100 \u00d7 65) \/ 200 = 32.5<\/li>\n<li>\ub0a8\uc131 \ube44\ud761\uc5f0: (100 \u00d7 135) \/ 200 = 67.5<\/li>\n<li>\uc5ec\uc131 \ud761\uc5f0: (100 \u00d7 65) \/ 200 = 32.5<\/li>\n<li>\uc5ec\uc131 \ube44\ud761\uc5f0: (100 \u00d7 135) \/ 200 = 67.5<\/li>\n<\/ul>\n<h3>4.2. \uce74\uc774\uc81c\uacf1 \ud1b5\uacc4\ub7c9 \uacc4\uc0b0<\/h3>\n<p>\uc774\uc81c \uce74\uc774\uc81c\uacf1 \ud1b5\uacc4\ub7c9\uc744 \uacc4\uc0b0\ud569\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\u03c7\u00b2 = ((40 &#8211; 32.5)\u00b2 \/ 32.5) + ((60 &#8211; 67.5)\u00b2 \/ 67.5) + ((25 &#8211; 32.5)\u00b2 \/ 32.5) + ((75 &#8211; 67.5)\u00b2 \/ 67.5)<\/li>\n<\/ul>\n<p>\uacc4\uc0b0\ud55c \uacb0\uacfc\ub97c \ud1b5\ud574 \uce74\uc774\uc81c\uacf1 \ud1b5\uacc4\ub7c9\uc744 \ud655\uc778\ud569\ub2c8\ub2e4.<\/p>\n<h3>4.3. p-\uac12 \ud655\uc778<\/h3>\n<p>\uc790\uc720\ub3c4\ub294 (\ud589 \uc218 &#8211; 1) \u00d7 (\uc5f4 \uc218 &#8211; 1) = 1\uc785\ub2c8\ub2e4. p-\uac12\uc744 \ud655\uc778\ud558\uace0 \uc720\uc758\uc218\uc900\uacfc \ube44\uad50\ud558\uc5ec \uadc0\ubb34\uac00\uc124\uc744 \ucc44\ud0dd\ud558\uac70\ub098 \uae30\uac01\ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n<section>\n<h2>5. \ud30c\uc774\uc36c\uc744 \uc774\uc6a9\ud55c \uce74\uc774\uc81c\uacf1 \uac80\uc815<\/h2>\n<p>Python\uc758 SciPy \ud328\ud0a4\uc9c0\ub97c \uc0ac\uc6a9\ud558\uc5ec \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc744 \uc27d\uac8c \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc544\ub798\ub294 \uc608\uc81c \ucf54\ub4dc\uc785\ub2c8\ub2e4:<\/p>\n<pre>\n            <code>\nimport scipy.stats as stats\n\n# \uad00\ucc30\ub41c \ube48\ub3c4\nobserved = [[40, 60], [25, 75]]\n\n# \uce74\uc774\uc81c\uacf1 \uac80\uc815\nchi2_stat, p_val, dof, expected = stats.chi2_contingency(observed)\n\nprint(f\"\uce74\uc774\uc81c\uacf1 \ud1b5\uacc4\ub7c9: {chi2_stat}, p-\uac12: {p_val}, \uc790\uc720\ub3c4: {dof}, \uae30\ub300 \ube48\ub3c4: {expected}\")\n            <\/code>\n        <\/pre>\n<p>\uc774 \ucf54\ub4dc\ub97c \uc2e4\ud589\ud558\uba74 \uce74\uc774\uc81c\uacf1 \ud1b5\uacc4\ub7c9, p-\uac12, \uc790\uc720\ub3c4 \ubc0f \uae30\ub300 \ube48\ub3c4\ub97c \uc9c0\uc815\ub41c \ud615\uc2dd\uc73c\ub85c \ucd9c\ub825\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<\/section>\n<section>\n<h2>6. \uacb0\ub860<\/h2>\n<p>\uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \ub450 \ubc94\uc8fc\ud615 \ubcc0\uc218 \uac04\uc758 \ub3c5\ub9bd\uc131\uc744 \uac80\ud1a0\ud558\ub294 \uc720\uc6a9\ud55c \ud1b5\uacc4\uc801 \ubc29\ubc95\uc785\ub2c8\ub2e4. \ubcf8 \uac15\uc88c\ub97c \ud1b5\ud574 \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc758 \uae30\ucd08 \uac1c\ub150, \ud1b5\uacc4\ub7c9 \uacc4\uc0b0 \ubc29\ubc95, \uadf8\ub9ac\uace0 Python\uc744 \uc774\uc6a9\ud55c \uc2e4\uc2b5\uc744 \uc18c\uac1c\ud588\uc2b5\ub2c8\ub2e4. \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc744 \ud1b5\ud574 \ub370\uc774\ud130 \ubd84\uc11d \ubc0f \ud574\uc11d\uc758 \uc815\ud655\uc131\uc744 \ub192\uc774\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub418\uae38 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n<p>\uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \ub9e4\uc6b0 \uc720\uc6a9\ud55c \ub3c4\uad6c\uc774\uc9c0\ub9cc, \ud56d\uc0c1 \uac80\uc815 \uc911 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uac00\uc815\uacfc \uc81c\ud55c \uc0ac\ud56d\uc744 \uace0\ub824\ud558\uc5ec \uacb0\uacfc\ub97c \ud574\uc11d\ud574\uc57c \ud569\ub2c8\ub2e4. \ub610\ud55c, \ub370\uc774\ud130 \ubd84\ud3ec\uc640 \ud2b9\uc131\uc744 \ucda9\ubd84\ud788 \uc774\ud574\ud558\uace0 \uac80\uc815\uc744 \uc9c4\ud589\ud558\ub294 \uac83\uc774 \uc911\uc694\ud569\ub2c8\ub2e4.<\/p>\n<\/section>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>\uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \ud1b5\uacc4\ud559\uc5d0\uc11c \ube48\ub3c4 \ub370\uc774\ud130\uc758 \uad00\ucc30\uac12\uacfc \uae30\ub300\uac12 \uac04\uc758 \ucc28\uc774\ub97c \ube44\uad50\ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \ube44\ubaa8\uc218\uc801 \uac80\uc815 \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc8fc\ub85c \ubc94\uc8fc\ud615 \ub370\uc774\ud130\uc5d0\uc11c \ub450 \ubcc0\uc218 \uac04\uc758 \ub3c5\ub9bd\uc131\uc744 \uac80\ud1a0\ud558\ub294 \ub370 \ud65c\uc6a9\ub429\ub2c8\ub2e4. 1. \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc758 \uae30\ubcf8 \uac1c\ub150 \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc740 \ub450 \uac1c \uc774\uc0c1\uc758 \ubc94\uc8fc\ud615 \ubcc0\uc218\uac00 \uc11c\ub85c \ub3c5\ub9bd\uc801\uc778\uc9c0\ub97c \ud310\ub2e8\ud558\uae30 \uc704\ud55c \ud1b5\uacc4\uc801 \ubc29\ubc95\uc785\ub2c8\ub2e4. \uc8fc\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uc0c1\ud669\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4: \ub450 \ubc94\uc8fc\ud615 \ubcc0\uc218 \uac04\uc758 \uad00\uacc4\ub97c \uc54c\uc544\ubcf4\uace0 \uc2f6\uc744 &hellip; <a href=\"https:\/\/atmokpo.com\/w\/40766\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;31.\uce74\uc774\uc81c\uacf1 \uac80\uc815(Chi-Square Test), \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc744 \uc774\uc6a9\ud55c \ub3c5\ub9bd\uc131 \uac80\uc815&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[219],"tags":[],"class_list":["post-40766","post","type-post","status-publish","format-standard","hentry","category-219"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>31.\uce74\uc774\uc81c\uacf1 \uac80\uc815(Chi-Square Test), \uce74\uc774\uc81c\uacf1 \uac80\uc815\uc744 \uc774\uc6a9\ud55c \ub3c5\ub9bd\uc131 \uac80\uc815 - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atmokpo.com\/w\/40766\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" 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