{"id":40820,"date":"2024-11-04T12:20:37","date_gmt":"2024-11-04T12:20:37","guid":{"rendered":"https:\/\/atmokpo.com\/w\/?p=40820"},"modified":"2024-11-26T06:38:21","modified_gmt":"2024-11-26T06:38:21","slug":"6-%eb%b6%84%ec%82%b0variance%ea%b3%bc-%ed%91%9c%ec%a4%80%ed%8e%b8%ec%b0%a8standard-deviation-%eb%b6%84%ec%82%b0%ea%b3%bc-%ed%91%9c%ec%a4%80%ed%8e%b8%ec%b0%a8%eb%a5%bc-%ec%9d%b4%ec%9a%a9%ed%95%9c","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/40820\/","title":{"rendered":"6.\ubd84\uc0b0(Variance)\uacfc \ud45c\uc900\ud3b8\ucc28(Standard Deviation), \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\ub97c \uc774\uc6a9\ud55c \ub370\uc774\ud130 \uc548\uc815\uc131 \ud3c9\uac00"},"content":{"rendered":"<p>\ub370\uc774\ud130 \ubd84\uc11d\uc5d0\uc11c \ubd84\uc0b0(Variance)\uacfc \ud45c\uc900\ud3b8\ucc28(Standard Deviation)\ub294 \ub9e4\uc6b0 \uc911\uc694\ud55c \uac1c\ub150\uc785\ub2c8\ub2e4. \uc774 \ub450 \uac00\uc9c0 \ud1b5\uacc4\ub7c9\uc740 \ub370\uc774\ud130\uc758 \ubcc0\ub3d9\uc131\uc744 \uce21\uc815\ud558\ub294\ub370 \uc720\uc6a9\ud558\uac8c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\uc758 \uc815\uc758, \uacc4\uc0b0 \ubc29\ubc95, \uadf8\ub9ac\uace0 \uc774\ub4e4\uc744 \ud1b5\ud574 \ub370\uc774\ud130\uc758 \uc548\uc815\uc131\uc744 \ud3c9\uac00\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>1. \ubd84\uc0b0(Variance)<\/h2>\n<p>\ubd84\uc0b0\uc740 \ub370\uc774\ud130 \uc9d1\ud569\uc758 \uac01 \uac12\uc774 \ud3c9\uade0\uac12\uc5d0\uc11c \uc5bc\ub9c8\ub098 \ub5a8\uc5b4\uc838 \uc788\ub294\uc9c0\ub97c \ub098\ud0c0\ub0b4\ub294 \uc9c0\ud45c\uc785\ub2c8\ub2e4. \uc989, \ub370\uc774\ud130\uc758 \ud769\uc5b4\uc9d0 \uc815\ub3c4\ub97c \uce21\uc815\ud558\ub294 \ud1b5\uacc4\ub7c9\uc774\ub77c \ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ubd84\uc0b0\uc774 \ub192\ub2e4\ub294 \uac83\uc740 \ub370\uc774\ud130\uac00 \ud3c9\uade0 \uc8fc\ubcc0\uc5d0 \ubc00\uc9d1\ub418\uc5b4 \uc788\uc9c0 \uc54a\uace0 \ub113\uac8c \ud37c\uc838 \uc788\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud558\uba70, \ubc18\ub300\ub85c \ubd84\uc0b0\uc774 \ub0ae\ub2e4\ub294 \uac83\uc740 \ub370\uc774\ud130\uac00 \ud3c9\uade0 \uc8fc\ubcc0\uc5d0 \ubaa8\uc5ec \uc788\ub2e4\ub294 \uac83\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\n<h3>1.1 \ubd84\uc0b0\uc758 \uc218\uc2dd<\/h3>\n<p>\ubd84\uc0b0\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \uc218\uc2dd\uc73c\ub85c \uc815\uc758\ub429\ub2c8\ub2e4:<\/p>\n<pre><code>\u03c3\u00b2 = (\u03a3 (x\u1d62 - \u03bc)\u00b2) \/ N<\/code><\/pre>\n<p>\uc5ec\uae30\uc11c \u03c3\u00b2\ub294 \ubd84\uc0b0, x\u1d62\ub294 \uac01 \ub370\uc774\ud130 \uc810, \u03bc\ub294 \ud3c9\uade0, N\uc740 \ub370\uc774\ud130 \uc810\uc758 \ucd1d \uac1c\uc218\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \uc774 \uacf5\uc2dd\uc5d0\uc11c \ubcfc \uc218 \uc788\ub4ef\uc774 \uac01 \ub370\uc774\ud130 \uc810\uacfc \ud3c9\uade0\uac12\uc758 \ucc28\uc774\ub97c \uc81c\uacf1\ud55c \ud6c4, \uadf8 \uac12\uc744 \ubaa8\ub450 \ub354\ud558\uace0 \ub370\uc774\ud130\uc758 \uac1c\uc218\ub85c \ub098\ub208 \uac12\uc774 \ubd84\uc0b0\uc785\ub2c8\ub2e4.<\/p>\n<h3>1.2 \ubaa8\uc9d1\ub2e8\uacfc \ud45c\ubcf8 \ubd84\uc0b0<\/h3>\n<p>\ubd84\uc0b0\uc740 \ubaa8\uc9d1\ub2e8\uacfc \ud45c\ubcf8\uc5d0 \ub530\ub77c \ub2e4\ub974\uac8c \uacc4\uc0b0\ub429\ub2c8\ub2e4. \ubaa8\uc9d1\ub2e8 \ubd84\uc0b0\uc740 \uc704\uc758 \uc218\uc2dd\uc744 \uadf8\ub300\ub85c \uc0ac\uc6a9\ud558\uba70, \ud45c\ubcf8 \ubd84\uc0b0\uc740 \ub370\uc774\ud130\uc758 \uac1c\uc218 N\uc744 N-1\ub85c \ub300\uccb4\ud558\uc5ec \uacc4\uc0b0\ud569\ub2c8\ub2e4. \uc774\ub294 \ud45c\ubcf8\uc5d0\uc11c \uacc4\uc0b0\ub41c \ubd84\uc0b0\uc774 \ubaa8\uc9d1\ub2e8 \ubd84\uc0b0\uc758 \ud3b8\ud5a5 \ucd94\uc815\uce58\uac00 \ub418\ub3c4\ub85d \ud558\uae30 \uc704\ud55c \ubc29\ubc95\uc785\ub2c8\ub2e4. \ub530\ub77c\uc11c, \ud45c\ubcf8 \ubd84\uc0b0\uc758 \uc218\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<pre><code>s\u00b2 = (\u03a3 (x\u1d62 - x\u0304)\u00b2) \/ (n - 1)<\/code><\/pre>\n<p>\uc5ec\uae30\uc11c s\u00b2\ub294 \ud45c\ubcf8 \ubd84\uc0b0, x\u0304\ub294 \ud45c\ubcf8 \ud3c9\uade0, n\uc740 \ud45c\ubcf8\uc758 \uac1c\uc218\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/p>\n<h2>2. \ud45c\uc900\ud3b8\ucc28(Standard Deviation)<\/h2>\n<p>\ud45c\uc900\ud3b8\ucc28\ub294 \ubd84\uc0b0\uc758 \uc591\uc218 \uc81c\uacf1\uadfc\uc73c\ub85c, \ub370\uc774\ud130 \uc9d1\ud569\uc758 \ubcc0\ub3d9\uc131\uc744 \uce21\uc815\ud558\ub294 \ub370 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ud45c\uc900\ud3b8\ucc28\ub294 \ub370\uc774\ud130\uc758 \ub2e8\uc704\uc640 \ub3d9\uc77c\ud558\uac8c \ud45c\ud604\ub418\ubbc0\ub85c \ub370\uc774\ud130\uc758 \ud574\uc11d\uc774 \uc6a9\uc774\ud569\ub2c8\ub2e4. \ud45c\uc900\ud3b8\ucc28\uac00 \ub0ae\uc744\uc218\ub85d \ub370\uc774\ud130\uac00 \ud3c9\uade0\uac12\uacfc \uac00\uae4c\uc774 \ubaa8\uc5ec \uc788\ub2e4\ub294 \uc758\ubbf8\uc774\uba70, \ubc18\ub300\ub85c \ud45c\uc900\ud3b8\ucc28\uac00 \ub192\uc73c\uba74 \ub370\uc774\ud130\uac00 \ud3c9\uade0\uc5d0\uc11c \uba40\ub9ac \ub5a8\uc5b4\uc838 \uc788\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\n<h3>2.1 \ud45c\uc900\ud3b8\ucc28\uc758 \uc218\uc2dd<\/h3>\n<p>\ud45c\uc900\ud3b8\ucc28\ub294 \ub2e4\uc74c\uc758 \uc218\uc2dd\uc73c\ub85c \ud45c\ud604\ub429\ub2c8\ub2e4:<\/p>\n<pre><code>\u03c3 = \u221a(\u03a3 (x\u1d62 - \u03bc)\u00b2 \/ N)<\/code><\/pre>\n<p>\uadf8\ub9ac\uace0 \ud45c\ubcf8 \ud45c\uc900\ud3b8\ucc28\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4:<\/p>\n<pre><code>s = \u221a(\u03a3 (x\u1d62 - x\u0304)\u00b2 \/ (n - 1))<\/code><\/pre>\n<h2>3. \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\uc758 \uad00\uacc4<\/h2>\n<p>\ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\ub294 \uc11c\ub85c \ubc00\uc811\ud55c \uad00\uacc4\ub97c \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4. \ubd84\uc0b0\uc740 \ub370\uc774\ud130\uc758 \ubcc0\ub3d9\uc131\uc744 \uc81c\uacf1\ud55c \uac12\uc73c\ub85c, \ud45c\uc900\ud3b8\ucc28\ub294 \uc774 \uac12\uc744 \uc2e4\uc218\ub85c \ub418\ub3cc\ub9ac\ub294 \uc791\uc5c5\uacfc \uac19\uc2b5\ub2c8\ub2e4. \uc774 \ub54c\ubb38\uc5d0 \ud45c\uc900\ud3b8\ucc28\ub294 \ub370\uc774\ud130 \ubd84\ud3ec\uc5d0 \ub300\ud55c \ubcf4\ub2e4 \uc9c1\uad00\uc801\uc778 \uc774\ud574\ub97c \uc81c\uacf5\ud558\uba70, \ub370\uc774\ud130 \ubd84\uc11d \ubcf4\uace0\uc11c\uc5d0\uc11c \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/p>\n<h2>4. \ub370\uc774\ud130 \uc548\uc815\uc131 \ud3c9\uac00<\/h2>\n<p>\ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\ub294 \ub370\uc774\ud130\uc758 \uc548\uc815\uc131\uc744 \ud3c9\uac00\ud558\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ub3d9\uc77c\ud55c \ud3c9\uade0\uc744 \uac00\uc9c4 \ub450 \uc9d1\ud569\uc758 \ub370\uc774\ud130\uac00 \uc788\uc744 \uacbd\uc6b0 \uac01\uac01\uc758 \ud45c\uc900\ud3b8\ucc28\ub97c \ube44\uad50\ud558\uc5ec \ubcc0\ub3d9\uc131\uc744 \ud3c9\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc548\uc815\uc801\uc778 \ub370\uc774\ud130\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \ud45c\uc900\ud3b8\ucc28\uac00 \ub0ae\uc73c\uba70, \ubd84\uc0b0\uc774 \uc791\uc740 \uacbd\uc6b0\uc785\ub2c8\ub2e4. \uc774\ub294 \uc2e4\ud5d8\uc774\ub098 \uc0dd\uc0b0 \uacf5\uc815\uc758 \uc2e0\ub8b0\uc131\uc744 \ub192\uc774\ub294 \ub370 \uae30\uc5ec\ud569\ub2c8\ub2e4.<\/p>\n<h3>4.1 \uc548\uc815\uc131 \ud3c9\uac00\uc758 \uc608<\/h3>\n<p>\uc608\ub97c \ub4e4\uc5b4, \ub450 \uac1c\uc758 \uacf5\uc7a5\uc5d0\uc11c \uc0dd\uc0b0\ud55c \uc81c\ud488\uc758 \ub192\uc774\ub97c \uce21\uc815\ud55c \uacb0\uacfc\uac00 \ub2e4\uc74c\uacfc \uac19\ub2e4\uace0 \uac00\uc815\ud569\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\uacf5\uc7a5 A: 10.1, 10.0, 10.2, 10.1, 10.1<\/li>\n<li>\uacf5\uc7a5 B: 9.5, 10.5, 10.0, 10.5, 9.0<\/li>\n<\/ul>\n<p> \uacf5\uc7a5 A\uc758 \uc81c\ud488 \ub192\uc774\ub294 \ud3c9\uade0\uc774 10.1, \ubd84\uc0b0\uc774 \ub0ae\uc544 \ub370\uc774\ud130\uac00 \ud3c9\uade0 \uc8fc\ubcc0\uc5d0 \uc9d1\uc911\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \uacf5\uc7a5 B\uc758 \uc81c\ud488 \ub192\uc774\ub294 \ud3c9\uade0\uc774 10.1, \uadf8\ub7ec\ub098 \ubd84\uc0b0\uc774 \ub113\uc5b4, \uadf8\ub7ac\uc744 \uacbd\uc6b0 \ub192\uc740 \ubcc0\ub3d9\uc131\uc744 \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ucc98\ub7fc \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\ub97c \ud1b5\ud574 \ub370\uc774\ud130\uc758 \uc548\uc815\uc131\uc744 \ud3c9\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>5. \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\uc758 \ud65c\uc6a9<\/h2>\n<p>\ud1b5\uacc4 \ubc0f \ub370\uc774\ud130 \ubd84\uc11d \ubd84\uc57c\uc5d0\uc11c \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\ub294 \uc5b4\ub514\uc5d0 \ud65c\uc6a9\ub420 \uc218 \uc788\ub294\uc9c0\uc5d0 \ub300\ud574 \ub2e4\ub8e8\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>5.1 \ud488\uc9c8 \uad00\ub9ac<\/h3>\n<p>\uc81c\uc870\uc5c5\uccb4\ub294 \uc81c\ud488\uc758 \ud488\uc9c8\uc744 \ubaa8\ub2c8\ud130\ub9c1\ud558\uae30 \uc704\ud574 \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uc81c\ud488\uc758 \ud488\uc9c8 \uae30\uc900\uc744 \uc720\uc9c0\ud558\uae30 \uc704\ud574, \ud45c\uc900\ud3b8\ucc28\uac00 \ub108\ubb34 \ud06c\uba74 \uc0dd\uc0b0 \uacf5\uc815\uc744 \uc870\uc815\ud574\uc57c \ud560 \ud544\uc694\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>5.2 \uae08\uc735 \ub370\uc774\ud130 \ubd84\uc11d<\/h3>\n<p>\ud22c\uc790\uc790\ub294 \uae08\uc735 \uc790\uc0b0\uc758 \uc218\uc775\ub960 \ubcc0\ub3d9\uc131\uc744 \uce21\uc815\ud558\uae30 \uc704\ud574 \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\ub97c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \ud45c\uc900\ud3b8\ucc28\uac00 \ub192\uc740 \uc790\uc0b0\uc740 \uc704\ud5d8\ub3c4\uac00 \ud06c\ubbc0\ub85c, \ud22c\uc790 \uacb0\uc815\uc744 \ub0b4\ub9b4 \ub54c \uc911\uc694\ud55c \uace0\ub824 \uc694\uc18c\uac00 \ub429\ub2c8\ub2e4.<\/p>\n<h3>5.3 \uc5f0\uad6c \ubc0f \uc2e4\ud5d8<\/h3>\n<p>\uacfc\ud559 \uc2e4\ud5d8\uc5d0\uc11c \uc5bb\uc740 \ub370\uc774\ud130\uc758 \uc2e0\ub8b0\uc131\uc744 \ud3c9\uac00\ud560 \ub54c, \uc5f0\uad6c\uc790\ub4e4\uc740 \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\ub97c \ubd84\uc11d\ud569\ub2c8\ub2e4. \uc774\ub294 \uc2e4\ud5d8 \uacb0\uacfc\uc758 \uc815\ud655\uc131\uacfc \uc2e0\ub8b0\uc131\uc744 \ub192\uc774\ub294 \ub370 \uae30\uc5ec\ud569\ub2c8\ub2e4.<\/p>\n<h2>\uacb0\ub860<\/h2>\n<p>\ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\ub294 \ub370\uc774\ud130\uc758 \ubcc0\ub3d9\uc131\uc744 \uce21\uc815\ud558\uace0 \uc548\uc815\uc131\uc744 \ud3c9\uac00\ud558\ub294 \ub370 \ud544\uc218\uc801\uc778 \ub3c4\uad6c\uc785\ub2c8\ub2e4. \uc774 \ub450 \uac00\uc9c0 \ud1b5\uacc4\ub7c9\uc744 \uc774\ud574\ud558\uace0 \ud65c\uc6a9\ud568\uc73c\ub85c\uc368 \ub370\uc774\ud130 \ubd84\uc11d\uac00\ub4e4\uc740 \ubcf4\ub2e4 \uc815\ud655\ud558\uace0 \uc2e0\ub8b0\ud560 \uc218 \uc788\ub294 \uacb0\ub860\uc744 \ub3c4\ucd9c\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ub370\uc774\ud130 \uc9d1\ud569\uc758 \ubd84\uc0b0 \ubc0f \ud45c\uc900\ud3b8\ucc28\ub97c \ubd84\uc11d\ud558\uc5ec \ub370\uc774\ud130\uc758 \ud2b9\uc131\uc744 \uc774\ud574\ud558\uace0, \uc548\uc815\uc131\uc744 \ud3c9\uac00\ud558\ub294 \uac83\uc740 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \uc911\uc694\uc131\uc744 \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc774 \uac15\uc88c\ub97c \ud1b5\ud574 \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\uc758 \uac1c\ub150\uc744 \uc798 \uc774\ud574\ud558\uace0, \uc774\ub97c \uc2e4\uc81c \ub370\uc774\ud130\uc5d0 \uc801\uc6a9\ud558\ub294 \ubc29\ubc95\uc744 \uc775\ud788\uae30\ub97c \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ub370\uc774\ud130 \ubd84\uc11d\uc5d0\uc11c \ubd84\uc0b0(Variance)\uacfc \ud45c\uc900\ud3b8\ucc28(Standard Deviation)\ub294 \ub9e4\uc6b0 \uc911\uc694\ud55c \uac1c\ub150\uc785\ub2c8\ub2e4. \uc774 \ub450 \uac00\uc9c0 \ud1b5\uacc4\ub7c9\uc740 \ub370\uc774\ud130\uc758 \ubcc0\ub3d9\uc131\uc744 \uce21\uc815\ud558\ub294\ub370 \uc720\uc6a9\ud558\uac8c \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \ubd84\uc0b0\uacfc \ud45c\uc900\ud3b8\ucc28\uc758 \uc815\uc758, \uacc4\uc0b0 \ubc29\ubc95, \uadf8\ub9ac\uace0 \uc774\ub4e4\uc744 \ud1b5\ud574 \ub370\uc774\ud130\uc758 \uc548\uc815\uc131\uc744 \ud3c9\uac00\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc124\uba85\ud558\uaca0\uc2b5\ub2c8\ub2e4. 1. \ubd84\uc0b0(Variance) \ubd84\uc0b0\uc740 \ub370\uc774\ud130 \uc9d1\ud569\uc758 \uac01 \uac12\uc774 \ud3c9\uade0\uac12\uc5d0\uc11c \uc5bc\ub9c8\ub098 \ub5a8\uc5b4\uc838 \uc788\ub294\uc9c0\ub97c \ub098\ud0c0\ub0b4\ub294 \uc9c0\ud45c\uc785\ub2c8\ub2e4. \uc989, \ub370\uc774\ud130\uc758 \ud769\uc5b4\uc9d0 \uc815\ub3c4\ub97c \uce21\uc815\ud558\ub294 \ud1b5\uacc4\ub7c9\uc774\ub77c \ud560 \uc218 &hellip; <a href=\"https:\/\/atmokpo.com\/w\/40820\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> 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