{"id":40840,"date":"2024-11-04T12:20:42","date_gmt":"2024-11-04T12:20:42","guid":{"rendered":"https:\/\/atmokpo.com\/w\/?p=40840"},"modified":"2024-11-26T06:38:18","modified_gmt":"2024-11-26T06:38:18","slug":"24-%ed%91%9c%eb%b3%b8-%ed%81%ac%ea%b8%b0sample-size%ec%99%80-%ed%91%9c%eb%b3%b8-%ec%98%a4%ec%b0%a8sampling-error-%ed%91%9c%eb%b3%b8-%ec%98%a4%ec%b0%a8%ea%b0%80-%ed%86%b5%ea%b3%84-%ea%b2%b0","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/40840\/","title":{"rendered":"24.\ud45c\ubcf8 \ud06c\uae30(Sample Size)\uc640 \ud45c\ubcf8 \uc624\ucc28(Sampling Error), \ud45c\ubcf8 \uc624\ucc28\uac00 \ud1b5\uacc4 \uacb0\uacfc\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5"},"content":{"rendered":"<p>\ud1b5\uacc4\ud559\uc740 \ubcf5\uc7a1\ud55c \uc0ac\ud68c \ud604\uc0c1\uc774\ub098 \uacbd\uc81c \ud604\uc0c1, \uc790\uc5f0 \ud604\uc0c1 \ub4f1\uc744 \uc774\ud574\ud558\uace0 \ubd84\uc11d\ud558\uae30 \uc704\ud55c \uac15\ub825\ud55c \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ubaa8\ub4e0 \ud1b5\uacc4 \ubd84\uc11d\uc5d0\uc11c \uc6d0\ub798 \ub370\uc774\ud130 \uc804\ubd80\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub294 \uac83\uc740 \uc544\ub2d9\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc0c1\ud669\uc5d0\uc11c \uc6b0\ub9ac\ub294 <strong>\ud45c\ubcf8(sample)<\/strong>\uc744 \uc0ac\uc6a9\ud558\uac8c \ub429\ub2c8\ub2e4. \ud45c\ubcf8\uc740 \uc804\uccb4 \uc9d1\ub2e8\uc5d0\uc11c \uc120\ud0dd\ub41c \uc77c\ubd80 \ub370\uc774\ud130 \ud3ec\uc778\ud2b8\ub97c \uc758\ubbf8\ud558\uba70, \ud45c\ubcf8 \ud06c\uae30\ub294 \uc774 \ud45c\ubcf8\uc758 \ud06c\uae30\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ube44\ub85d \ud45c\ubcf8\uc744 \uc0ac\uc6a9\ud560 \ub54c, \uc6b0\ub9ac\ub294 \uc120\ud0dd\ub41c \uc0d8\ud50c\uc774 \uc804\uccb4 \uc9d1\ub2e8\uc744 \uc798 \ub300\ud45c\ud560 \uac83\uc774\ub77c\ub294 \uac00\uc815\uc744 \ud569\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \uc0d8\ud50c\ub85c \uc778\ud55c \uc624\ucc28\ub97c \uc774\ud574\ud558\uace0 \uad00\ub9ac\ud558\ub294 \uac83\uc774 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. \ubcf8 \uac15\uc88c\uc5d0\uc11c\ub294 \ud45c\ubcf8 \ud06c\uae30\uc640 \ud45c\ubcf8 \uc624\ucc28, \uadf8\ub9ac\uace0 \ud45c\ubcf8 \uc624\ucc28\uac00 \ud1b5\uacc4 \uacb0\uacfc\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \uc2ec\ub3c4 \uae4a\uac8c \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>1. \ud45c\ubcf8 \ud06c\uae30(Sample Size)<\/h2>\n<p>\ud45c\ubcf8 \ud06c\uae30\ub780 \uc774\ub8e8\uc5b4\uc9c4 \uc5f0\uad6c\ub098 \uc870\uc0ac\uc5d0\uc11c \uc120\ud0dd\ub41c \uad00\uce21\uce58\uc758 \uac1c\uc218\ub97c \uc758\ubbf8\ud569\ub2c8\ub2e4. \ud1b5\uacc4\uc801\uc73c\ub85c \ud45c\ubcf8 \ud06c\uae30\ub294 \uc870\uc0ac\ud558\uace0\uc790 \ud558\ub294 \ubaa8\uc9d1\ub2e8\uc758 \ud2b9\uc131\uc744 \uc5b4\ub5bb\uac8c \uc798 \ubc18\uc601\ud560\uc9c0\ub97c \uacb0\uc815\uc9d3\ub294 \uc911\uc694\ud55c \uc694\uc18c\uc785\ub2c8\ub2e4. \ud45c\ubcf8 \ud06c\uae30\uac00 \ucda9\ubd84\ud788 \ud06c\uba74 \ud074\uc218\ub85d, \uc6b0\ub9ac\ub294 \ubaa8\uc9d1\ub2e8\uc758 \ud2b9\uc131\uc744 \ub354 \uc815\ud655\ud558\uac8c \ucd94\ub860\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ud45c\ubcf8 \ud06c\uae30\ub97c \uacb0\uc815\ud560 \ub54c \uace0\ub824\ud574\uc57c \ud560 \uba87 \uac00\uc9c0 \uc694\uc18c\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li><strong>\ubaa8\uc9d1\ub2e8\uc758 \uc774\uc9c8\uc131(Heterogeneity):<\/strong> \ubaa8\uc9d1\ub2e8 \ub0b4\uc758 \ub2e4\uc591\uc131\uc774 \ud074\uc218\ub85d, \uc989 \uc774\uc9c8\uc131\uc774 \ud074\uc218\ub85d \ub354 \ud070 \ud45c\ubcf8 \ud06c\uae30\uac00 \ud544\uc694\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\uc624\ucc28 \ud5c8\uc6a9 \ubc94\uc704(Margin of Error):<\/strong> \uc6b0\ub9ac\uac00 \ud5c8\uc6a9\ud560 \uc218 \uc788\ub294 \uc624\ucc28\uc758 \uc815\ub3c4\uac00 \ud074\uc218\ub85d \ud544\uc694\ud55c \ud45c\ubcf8 \ud06c\uae30\ub294 \uc791\uc544\uc9d1\ub2c8\ub2e4.<\/li>\n<li><strong>\uc2e0\ub8b0 \uc218\uc900(Confidence Level):<\/strong> \ubcf4\ud1b5 95% \ub610\ub294 99%\uc758 \uc2e0\ub8b0 \uc218\uc900\uc744 \uac00\uc815\ud558\ub294\ub370, \uc774 \uc218\uc900\uc774 \ub192\uc744\uc218\ub85d \ub354 \ud070 \ud45c\ubcf8 \ud06c\uae30\uac00 \uc694\uad6c\ub429\ub2c8\ub2e4.<\/li>\n<li><strong>\uae30\ud0c0 \uc694\uc778:<\/strong> \uc870\uc0ac \ubc29\ubc95, \ub370\uc774\ud130 \ubd84\uc11d \ubaa9\uc801, \ube44\uc6a9 \ub4f1\uc758 \uc694\uc18c\ub3c4 \ud45c\ubcf8 \ud06c\uae30 \uacb0\uc815\uc5d0 \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>1.1. \ud45c\ubcf8 \ud06c\uae30 \uacc4\uc0b0 \ubc29\ubc95<\/h3>\n<p>\ud45c\ubcf8 \ud06c\uae30\ub97c \uacb0\uc815\ud558\uae30 \uc704\ud574 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ud558\ub294 \uacf5\uc2dd\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uac00\uc7a5 \ub9ce\uc774 \uc0ac\uc6a9\ub418\ub294 \ud45c\ubcf8 \ud06c\uae30 \uacc4\uc0b0 \uacf5\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<p><img decoding=\"async\" alt=\"Sample Size Formula\" src=\"https:\/\/chart.googleapis.com\/chart?cht=tx&amp;chl=n=%20\\\\frac{Z^2%20*p%20*(1-p)}{E^2}\"\/><\/p>\n<p>\uc5ec\uae30\uc11c:<\/p>\n<ul>\n<li><strong>n:<\/strong> \ud45c\ubcf8 \ud06c\uae30<\/li>\n<li><strong>Z:<\/strong> \ud45c\uc900 \uc815\uaddc \ubd84\ud3ec\uc5d0\uc11c\uc758 Z-\uac12 (\uc2e0\ub8b0\uc218\uc900\uc5d0 \ub530\ub77c \uacb0\uc815\ub428)<\/li>\n<li><strong>p:<\/strong> \ubaa8\uc9d1\ub2e8\uc5d0\uc11c \uce21\uc815\ud558\uace0\uc790 \ud558\ub294 \ube44\uc728\uc758 \uc608\uc0c1\uac12 (\uc608: \ube44\uc728\uc778 \uacbd\uc6b0)<\/li>\n<li><strong>E:<\/strong> \uc624\ucc28 \ud5c8\uc6a9 \ubc94\uc704 (Margin of Error)<\/li>\n<\/ul>\n<p>\uc608\ub97c \ub4e4\uc5b4, \uc5b4\ub5a4 \uc124\ubb38\uc870\uc0ac\ub97c \ud1b5\ud574 \ud2b9\uc815 \uc81c\ud488\uc758 \uc120\ud638\ub3c4\uac00 60%\uc77c \uac83\uc774\ub77c\uace0 \uc608\uc0c1\ub41c\ub2e4\uba74 p = 0.6, \uc624\ucc28 \ud5c8\uc6a9 \ubc94\uc704\ub97c 5%\ub85c \uc124\uc815\ud558\uace0 (E = 0.05), 95% \uc2e0\ub8b0\uc218\uc900\uc744 \uac00\uc815\ud560 \uacbd\uc6b0 Z\uac12\uc740 1.96\uc774 \ub429\ub2c8\ub2e4. \uc774 \uac12\uc744 \uacf5\uc2dd\uc5d0 \ub300\uc785\ud558\uc5ec \uacc4\uc0b0\ud558\uba74 \ub429\ub2c8\ub2e4.<\/p>\n<h2>2. \ud45c\ubcf8 \uc624\ucc28(Sampling Error)<\/h2>\n<p>\ud45c\ubcf8 \uc624\ucc28\ub294 \ud45c\ubcf8\uc73c\ub85c\ubd80\ud130 \uc5bb\uc5b4\uc9c4 \ud1b5\uacc4\ub7c9\uc774 \ubaa8\uc9d1\ub2e8\uc758 \uc2e4\uc81c \uac12\uacfc \ucc28\uc774\uac00 \ub098\ub294 \uc815\ub3c4\ub97c \uc758\ubbf8\ud569\ub2c8\ub2e4. \ud45c\ubcf8 \uc624\ucc28\ub294 \ub2e4\uc591\ud55c \uc694\uc778\uc5d0 \uc758\ud574 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc73c\uba70, \ubaa8\uc9d1\ub2e8\uc758 \ud2b9\uc131\uacfc \ud45c\ubcf8 \ud06c\uae30\uc640 \uac15\ud55c \uad00\ub828\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ud45c\ubcf8 \uc624\ucc28\ub294 \ub450 \uc885\ub958\ub85c \ub098\ub20c \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li><strong>\ubb34\uc791\uc704 \uc624\ucc28(Random Error):<\/strong> \uc0d8\ud50c\ub9c1 \uacfc\uc815\uc5d0\uc11c \ubb34\uc791\uc704\ub85c \ubc1c\uc0dd\ud558\ub294 \uc624\ucc28\ub85c, \uc77c\ubc18\uc801\uc73c\ub85c \ud070 \uc601\ud5a5\uc744 \ubbf8\uce58\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\uccb4\uacc4\uc801 \uc624\ucc28(Systematic Error):<\/strong> \uc0d8\ud50c\ub9c1 \ubc29\ubc95\uc774\ub098 \ub370\uc774\ud130 \uc218\uc9d1 \uacfc\uc815\uc5d0\uc11c \uc77c\uc815\ud55c \ubc29\uc2dd\uc73c\ub85c \ubc1c\uc0dd\ud558\ub294 \uc624\ucc28\uc785\ub2c8\ub2e4. \uc774\ub294 \ub354 \uc2ec\uac01\ud55c \uc601\ud5a5\uc744 \ubbf8\uce60 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h3>2.1. \ud45c\ubcf8 \uc624\ucc28 \uacc4\uc0b0<\/h3>\n<p>\ud45c\ubcf8 \uc624\ucc28\ub97c \uc815\ub7c9\uc801\uc73c\ub85c \ud3c9\uac00\ud558\uae30 \uc704\ud574\uc11c\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uacf5\uc2dd\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4:<\/p>\n<p><img decoding=\"async\" alt=\"Sampling Error Formula\" src=\"https:\/\/chart.googleapis.com\/chart?cht=tx&amp;chl=SE=%20\\\\sqrt{\\\\frac{p(1-p)}{n}}\"\/><\/p>\n<p>\uc5ec\uae30\uc11c:<\/p>\n<ul>\n<li><strong>SE:<\/strong> \ud45c\ubcf8 \uc624\ucc28 (Standard Error)<\/li>\n<li><strong>p:<\/strong> \ubaa8\uc9d1\ub2e8\uc5d0\uc11c \uce21\uc815\ud558\uace0\uc790 \ud558\ub294 \ube44\uc728\uc758 \uc608\uc0c1\uac12<\/li>\n<li><strong>n:<\/strong> \ud45c\ubcf8 \ud06c\uae30<\/li>\n<\/ul>\n<p>\uc608\ub97c \ub4e4\uc5b4, p\uac00 0.6\uc774\uace0, \ud45c\ubcf8 \ud06c\uae30 n\uc774 100\uc774\ub77c\uba74 \ud45c\ubcf8 \uc624\ucc28\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4:<\/p>\n<p>SE = sqrt((0.6 * (1 &#8211; 0.6)) \/ 100) = sqrt(0.024) \u2248 0.154<\/p>\n<h2>3. \ud45c\ubcf8 \uc624\ucc28\uac00 \ud1b5\uacc4 \uacb0\uacfc\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5<\/h2>\n<p>\ud45c\ubcf8 \uc624\ucc28\ub294 \ubd84\uc11d \uacb0\uacfc\uc5d0 \ud070 \uc601\ud5a5\uc744 \ubbf8\uce58\ubbc0\ub85c, \uc774\ub97c \ubb34\uc2dc\ud574\uc11c\ub294 \uc548 \ub429\ub2c8\ub2e4. \uc544\ub798\uc5d0\uc11c\ub294 \ud45c\ubcf8 \uc624\ucc28\uac00 \ud1b5\uacc4 \uacb0\uacfc\uc5d0 \ubbf8\uce58\ub294 \uba87 \uac00\uc9c0 \uc911\uc694\ud55c \uc601\ud5a5\uc744 \uc0b4\ud3b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>3.1. \uc2e0\ub8b0\uad6c\uac04(Confidence Interval)<\/h3>\n<p>\ud45c\ubcf8 \uc624\ucc28\ub294 \uc2e0\ub8b0\uad6c\uac04\uc744 \uc124\uc815\ud558\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc2e0\ub8b0\uad6c\uac04\uc740 \ubd84\uc11d\ub41c \ud45c\ubcf8 \ub370\uc774\ud130\uac00 \ubaa8\uc9d1\ub2e8\uc5d0\uc11c\uc758 \uc9c4\uc9dc \uac12\uc774 \ud3ec\ud568\ub420 \uac00\ub2a5\uc131\uc744 \ub098\ud0c0\ub0b4\ub294 \uad6c\uac04\uc785\ub2c8\ub2e4. \ud45c\ubcf8 \uc624\ucc28\uac00 \ud06c\uba74 \uc2e0\ub8b0\uad6c\uac04\ub3c4 \ub113\uc5b4\uc9c0\uba70, \uc774\ub294 \uc6b0\ub9ac \uacb0\uacfc\uc758 \ubd88\ud655\uc2e4\uc131\uc744 \uc99d\uac00\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\n<h3>3.2. \ucd94\uc815\uce58(Bias) \ubc0f \uc815\ud655\ub3c4(Accuracy)<\/h3>\n<p>\ud45c\ubcf8 \uc624\ucc28\ub294 \uc6b0\ub9ac\uac00 \ubaa8\uc9d1\ub2e8\uc5d0\uc11c \uc2e4\uc81c \uac12\uc5d0 \uc5bc\ub9c8\ub098 \uac00\uae4c\uc6b4\uc9c0\ub97c \ub098\ud0c0\ub0b4\ub294 \uc77c\uc885\uc758 \uc9c0\ud45c\uc785\ub2c8\ub2e4. \ud45c\ubcf8 \uc624\ucc28\uac00 \uc801\uc744\uc218\ub85d, \uc6b0\ub9ac\uc758 \ucd94\uc815\uce58\ub294 \ub354 \uc815\ud655\ud558\uace0 \uc2e0\ub8b0\ud560 \uc218 \uc788\ub294 \ub370\uc774\ud130\uc785\ub2c8\ub2e4. \ubc18\uba74 \uccb4\uacc4\uc801 \uc624\ucc28\uac00 \uc874\uc7ac\ud55c\ub2e4\uba74, \uc6b0\ub9ac\uc758 \ucd94\uc815\uce58\ub294 \uc65c\uace1\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>3.3. \uacb0\ub860\uc758 \uc77c\ubc18\ud654(Generalization)<\/h3>\n<p>\uc5f0\uad6c \uacb0\uacfc\ub97c \ubaa8\uc9d1\ub2e8\uc5d0 \uc77c\ubc18\ud654\ud558\uae30 \uc704\ud574\uc11c\ub294 \ud45c\ubcf8 \uc624\ucc28\ub97c \ucd5c\uc18c\ud654\ud574\uc57c \ud569\ub2c8\ub2e4. \ub9cc\uc57d \ud45c\ubcf8 \uc624\ucc28\uac00 \ud06c\ub2e4\uba74, \uc5f0\uad6c \uacb0\uacfc\ub97c \uc804\uccb4 \ubaa8\uc9d1\ub2e8\uc5d0 \uc801\uc808\ud788 \ud655\uc7a5\ud558\uae30 \uc5b4\ub824\uc6b8 \uc218 \uc788\uc73c\uba70, \uc774\ub294 \uc798\ubabb\ub41c \uacb0\ub860\uc73c\ub85c \uc774\uc5b4\uc9c8 \uc704\ud5d8\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>\uacb0\ub860<\/h2>\n<p>\ud45c\ubcf8 \ud06c\uae30\uc640 \ud45c\ubcf8 \uc624\ucc28\ub294 \ud1b5\uacc4 \ubd84\uc11d\uc5d0\uc11c \ud544\uc218\uc801\uc73c\ub85c \uace0\ub824\ud574\uc57c \ud560 \ud575\uc2ec \uc694\uc18c\uc785\ub2c8\ub2e4. \uc801\uc808\ud55c \ud45c\ubcf8 \ud06c\uae30\ub97c \uc124\uc815\ud558\uace0 \ud45c\ubcf8 \uc624\ucc28\ub97c \uad00\ub9ac\ud568\uc73c\ub85c\uc368 \uc6b0\ub9ac\ub294 \ub354 \uc2e0\ub8b0\ud560 \uc218 \uc788\ub294 \ud1b5\uacc4 \uacb0\uacfc\ub97c \uc5bb\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub370\uc774\ud130\uc758 \ud615\ud0dc\uc640 \ubaa9\uc801\uc5d0 \ub530\ub77c \uc801\ud569\ud55c \ud45c\ubcf8 \ud06c\uae30\ub97c \uc120\ud0dd\ud558\ub294 \uac83\uc740 \ud1b5\uacc4\uc801 \ubd84\uc11d\uc758 \uc131\uacf5\uacfc \uc2e4\ud328\ub97c \uac00\ub974\ub294 \uc911\uc694\ud55c \ubd84\uae30\uc810\uc774 \ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\ub610\ud55c, \ud45c\ubcf8 \uc624\ucc28\uc758 \ud6a8\uacfc\ub97c \uc2ec\ub3c4 \uc788\uac8c \uc774\ud574\ud558\uace0 \uad00\ub9ac\ud568\uc73c\ub85c\uc368, \uc6b0\ub9ac\ub294 \ub354 \ub098\uc740 \uc758\uc0ac\uacb0\uc815\uc744 \ud560 \uc218 \uc788\ub294 \uae30\ucd08 \uc790\ub8cc\ub97c \ucd95\uc801\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud45c\ubcf8 \uc624\ucc28\ub97c \uc774\ud574\ud558\uace0 \uadf8 \uc601\ud5a5\uc744 \ucd5c\uc18c\ud654\ud558\ub294 \uac83\uc740 \ud1b5\uacc4\uc801 \ubd84\uc11d\uc758 \ud488\uc9c8\uc744 \ub192\uc774\ub294 \uccab \ubc1c\uac78\uc74c\uc785\ub2c8\ub2e4. \ub530\ub77c\uc11c \ud1b5\uacc4\ud559\uc744 \uacf5\ubd80\ud558\ub294 \ubaa8\ub4e0 \uc774\ub4e4\uc740 \uc774 \uacfc\uc815\uc744 \ud1b5\ud574 \uadf8 \uc911\uc694\uc131\uc744 \ub2e4\uc2dc \ud55c\ubc88 \uc778\uc2dd\ud574\uc57c \ud560 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