\ub370\uc774\ud130\uc758 \ubcc0\ub3d9\uc131(Variability):<\/strong> \ub370\uc774\ud130\uc758 \ubcc0\ub3d9\uc131\uc774 \ud074\uc218\ub85d \uce21\uc815\uc758 \uc815\ud655\uc131\uc744 \ub192\uc774\uae30 \uc704\ud574 \ub354 \ud070 \ud45c\ubcf8\uc744 \uc694\uad6c\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n1.1 \ud45c\ubcf8 \ud06c\uae30 \uacb0\uc815 \ubc29\ubc95<\/h3>\n
\ud45c\ubcf8 \ud06c\uae30\ub97c \uacb0\uc815\ud558\uae30 \uc704\ud55c \uba87 \uac00\uc9c0 \uae30\uc900\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ub9ce\uc774 \uc0ac\uc6a9\ub418\ub294 \ud45c\ubcf8 \ud06c\uae30 \uacc4\uc0b0 \uacf5\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n
n = (Z^2 * p * (1 - p)) \/ E^2<\/code><\/pre>\n\uc5ec\uae30\uc11c:<\/p>\n
\n- n:<\/strong> \ud544\uc694 \ud45c\ubcf8 \ud06c\uae30<\/li>\n
- Z:<\/strong> \ud45c\uc900 \uc815\uaddc \ubd84\ud3ec\uc758 Z-\uc810\uc218 (\uc608: 95% \uc2e0\ub8b0\uc218\uc900\uc5d0\uc11c Z=1.96)<\/li>\n
- p:<\/strong> \ubaa8\uc9d1\ub2e8\uc5d0\uc11c \uad00\uc2ec \uc788\ub294 \ud2b9\uc131\uc758 \ube44\uc728 (\uc608: 50%\uc774\uba74 0.5)<\/li>\n
- E:<\/strong> \ud5c8\uc6a9\ud560 \uc218 \uc788\ub294 \uc624\ucc28 \ubc94\uc704 (\uc608: \u00b15%=0.05)<\/li>\n<\/ul>\n
\uc608\ub97c \ub4e4\uc5b4, 95%\uc758 \uc2e0\ub8b0 \uc218\uc900\uc5d0\uc11c 50%\uc758 \ube44\uc728(p=0.5)\uacfc \u00b15%\uc758 \uc624\ucc28 \ud55c\uacc4(E=0.05)\ub97c \uc124\uc815\ud55c\ub2e4\uba74, \ud45c\ubcf8 \ud06c\uae30\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4.<\/p>\n
\n
\uc608\uc81c:<\/strong><\/p>\n\uc2e0\ub8b0 \uc218\uce58 Z = 1.96, p = 0.5, E = 0.05\ub97c \ub300\uc785\ud558\uc5ec:<\/p>\n
n = (1.96^2 * 0.5 * (1 - 0.5)) \/ (0.05^2)\nn = (3.8416 * 0.5 * 0.5) \/ 0.0025\nn = 384.16<\/code><\/pre>\n\ub530\ub77c\uc11c, \uc774 \uacbd\uc6b0 \ud45c\ubcf8 \ud06c\uae30\ub294 385\ub85c \uc124\uc815\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n<\/div>\n
2. \ud45c\ubcf8 \uc624\ucc28(Sampling Error)<\/h2>\n
\ud45c\ubcf8 \uc624\ucc28\ub294 \uc120\ud0dd\ub41c \ud45c\ubcf8\uc758 \uacb0\uacfc\uac00 \uc2e4\uc81c \ubaa8\uc9d1\ub2e8\uc758 \ud2b9\uc131\uacfc \uc5bc\ub9c8\ub098 \ub2e4\ub978\uc9c0\ub97c \ub098\ud0c0\ub0b4\ub294 \ucc99\ub3c4\uc785\ub2c8\ub2e4. \uc989, \ud45c\ubcf8\uc5d0\uc11c \uc5bb\uc740 \ud1b5\uacc4\ub7c9\uc774 \ubaa8\uc9d1\ub2e8\uc758 \uc2e4\uc81c \uac12\uc744 \uc5bc\ub9c8\ub098 \ubc97\uc5b4\ub098\ub294\uc9c0\ub97c \uce21\uc815\ud569\ub2c8\ub2e4.<\/p>\n
\ud45c\ubcf8 \uc624\ucc28\ub294 \ub2e4\uc74c \uc694\uc18c\uc5d0 \uc758\ud574 \uc601\ud5a5\uc744 \ubc1b\uc2b5\ub2c8\ub2e4:<\/p>\n
\n- \ud45c\ubcf8 \ud06c\uae30:<\/strong> \ub354 \ud070 \ud45c\ubcf8 \ud06c\uae30\ub294 \uc77c\ubc18\uc801\uc73c\ub85c \ud45c\ubcf8 \uc624\ucc28\ub97c \uc904\uc5ec\uc90d\ub2c8\ub2e4.<\/li>\n
- \ubaa8\uc9d1\ub2e8\uc758 \uc774\uc9c8\uc131:<\/strong> \ubaa8\uc9d1\ub2e8 \ub0b4\uc758 \ubcc0\ub3d9\uc131\uc774 \ud074\uc218\ub85d \ud45c\ubcf8 \uc624\ucc28\uac00 \uc99d\uac00\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n
- \ud45c\uc9d1 \ubc29\ubc95:<\/strong> \ubb34\uc791\uc704 \ud45c\ubcf8 \ucd94\ucd9c \ubc29\ubc95\uc740 \ub300\ud45c\uc131\uc744 \ub192\uc774\uace0 \ud45c\ubcf8 \uc624\ucc28\ub97c \uc904\uc774\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub429\ub2c8\ub2e4.<\/li>\n<\/ul>\n
2.1 \ud45c\ubcf8 \uc624\ucc28\uc758 \uacc4\uc0b0<\/h3>\n
\ud45c\ubcf8 \uc624\ucc28\ub97c \uacc4\uc0b0\ud558\ub294 \uc77c\ubc18\uc801\uc778 \uacf5\uc2dd\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n
ME = Z * (\u03c3 \/ \u221an)<\/code><\/pre>\n\uc5ec\uae30\uc11c:<\/p>\n
\n- ME:<\/strong> \ud45c\ubcf8 \uc624\ucc28<\/li>\n
- Z:<\/strong> \ud45c\uc900 \uc815\uaddc \ubd84\ud3ec\uc758 Z-\uc810\uc218<\/li>\n
- \u03c3:<\/strong> \ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28<\/li>\n
- n:<\/strong> \ud45c\ubcf8 \ud06c\uae30<\/li>\n<\/ul>\n
\uc608\ub97c \ub4e4\uc5b4, \ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28\uac00 10\uc774\uace0, \ud45c\ubcf8 \ud06c\uae30\uac00 385\uc774\uba70, \uc2e0\ub8b0\uc218\uce58\uac00 1.96\uc774\ub77c\uba74 \ud45c\ubcf8 \uc624\ucc28\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4.<\/p>\n
\n
\uc608\uc81c:<\/strong><\/p>\nME = 1.96 * (10 \/ \u221a385) = 1.96 * (10 \/ 19.62) \u2248 1.00<\/p>\n
\ub530\ub77c\uc11c, \uc774 \uacbd\uc6b0 \ud45c\ubcf8 \uc624\ucc28\ub294 \uc57d \u00b11.00\uc785\ub2c8\ub2e4.<\/p>\n<\/div>\n
3. \ud45c\ubcf8 \ud06c\uae30\uc640 \ud45c\ubcf8 \uc624\ucc28\uc758 \uad00\uacc4<\/h2>\n
\ud45c\ubcf8 \ud06c\uae30\uc640 \ud45c\ubcf8 \uc624\ucc28\ub294 \ubc00\uc811\ud55c \uad00\uacc4\uac00 \uc788\uc2b5\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \ud45c\ubcf8 \ud06c\uae30\uac00 \uc99d\uac00\ud558\uba74 \ud45c\ubcf8 \uc624\ucc28\uac00 \uac10\uc18c\ud558\ub294 \uacbd\ud5a5\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \ub354 \ub9ce\uc740 \ud45c\ubcf8\uc744 \ud1b5\ud574 \ubaa8\uc9d1\ub2e8\uc758 \ud2b9\uc131\uc744 \ub354\uc6b1 \uc815\ud655\ud558\uac8c \ucd94\uc815\ud560 \uc218 \uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \ubc18\ub300\ub85c, \ud45c\ubcf8 \ud06c\uae30\uac00 \uc791\uc73c\uba74 \ud45c\ubcf8 \uc624\ucc28\uac00 \ucee4\uc838 \ubaa8\uc9d1\ub2e8\uc758 \uc2e4\uc81c \ud2b9\uc131\uacfc\uc758 \ucc28\uc774\uac00 \ub354\uc6b1 \ub450\ub4dc\ub7ec\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\ub2e4\uc74c\uc740 \ud45c\ubcf8 \ud06c\uae30\uc640 \ud45c\ubcf8 \uc624\ucc28 \uac04\uc758 \uad00\uacc4\ub97c \ub098\ud0c0\ub0b4\ub294 \uadf8\ub798\ud504\uc785\ub2c8\ub2e4. \uac00\ub85c\ucd95\uc740 \ud45c\ubcf8 \ud06c\uae30, \uc138\ub85c\ucd95\uc740 \ud45c\ubcf8 \uc624\ucc28\uc774\uba70, \ud45c\ubcf8 \ud06c\uae30\uac00 \uc99d\uac00\ud568\uc5d0 \ub530\ub77c \ud45c\ubcf8 \uc624\ucc28\uac00 \uac10\uc18c\ud558\ub294 \ubaa8\uc2b5\uc744 \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
4. \uacb0\ub860<\/h2>\n
\uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \ud45c\ubcf8 \ud06c\uae30\uc640 \ud45c\ubcf8 \uc624\ucc28\uc5d0 \ub300\ud55c \uae30\ubcf8 \uac1c\ub150\uacfc \uc774\ub4e4 \uac04\uc758 \uad00\uacc4\ub97c \uc0b4\ud3b4\ubcf4\uc558\uc2b5\ub2c8\ub2e4. \ud45c\ubcf8 \ud06c\uae30\ub97c \uc801\uc808\ud788 \uc124\uc815\ud558\uace0 \ud45c\ubcf8 \uc624\ucc28\ub97c \uc774\ud574\ud558\ub294 \uac83\uc740 \ud1b5\uacc4\uc801 \ucd94\uc815\uc758 \uc2e0\ub8b0\uc131\uacfc \uc815\ud655\uc131\uc744 \ub192\uc774\ub294 \ub370 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c, \uc5f0\uad6c\ub97c \uc218\ud589\ud558\ub294\ub370 \uc788\uc5b4 \uc774\ub7ec\ud55c \uac1c\ub150\uc744 \uba85\ud655\ud788 \uc774\ud574\ud558\uace0 \uc801\uc6a9\ud558\ub294 \uac83\uc774 \ud544\uc218\uc801\uc785\ub2c8\ub2e4.<\/p>\n
\ub370\uc774\ud130 \ubd84\uc11d \ubc0f \ud1b5\uacc4\uc801 \uc5f0\uad6c\ub97c \uc9c4\ud589\ud560 \ub54c, \ud45c\ubcf8 \ud06c\uae30\uc640 \ud45c\ubcf8 \uc624\ucc28\uc758 \uc911\uc694\uc131\uc744 \ud56d\uc0c1 \uc5fc\ub450\uc5d0 \ub450\uace0 \uacc4\ud68d\uc744 \uc138\uc6b0\ub294 \uac83\uc774 \ud544\uc694\ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \ubcf4\ub2e4 \uc2e0\ub8b0\ud560 \uc218 \uc788\uace0 \uc815\ud655\ud55c \uc5f0\uad6c \uacb0\uacfc\ub97c \ub3c4\ucd9c\ud560 \uc218 \uc788\uc744 \uac83\uc785\ub2c8\ub2e4.<\/p>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"
\ud1b5\uacc4\ud559\uc5d0\uc11c \ud45c\ubcf8 \ud06c\uae30(Sample Size)\uc640 \ud45c\ubcf8 \uc624\ucc28(Sampling Error)\ub294 \uc5f0\uad6c \uc124\uacc4\uc5d0 \uc788\uc5b4 \uac00\uc7a5 \uc911\uc694\ud55c \uc694\uc18c \uc911 \ud558\ub098\uc785\ub2c8\ub2e4. \uc774 \ub450 \uac1c\ub150\uc740 \ud2b9\uc815 \ubaa8\uc9d1\ub2e8\uc5d0 \ub300\ud55c \ud1b5\uacc4\uc801 \ucd94\uc815\uc744 \uc218\ud589\ud560 \ub54c \uc9c1\uc811\uc801\uc73c\ub85c \uc5f0\uad00\ub418\uc5b4 \uc788\uc73c\uba70, \uc5f0\uad6c \uacb0\uacfc\uc758 \uc2e0\ub8b0\uc131\uacfc \ud0c0\ub2f9\uc131\uc5d0 \uacb0\uc815\uc801\uc778 \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4. \uc774\ubc88 \uac15\uc88c\uc5d0\uc11c\ub294 \ud45c\ubcf8 \ud06c\uae30\uc640 \ud45c\ubcf8 \uc624\ucc28\uc758 \uc815\uc758, \uc774\ub4e4 \uac04\uc758 \uad00\uacc4, \ubc0f \ud45c\ubcf8 \ud06c\uae30\uc5d0 \ub530\ub978 \ud45c\ubcf8 \uc624\ucc28 \uac1c\ub150\uc5d0 \ub300\ud574 \uc790\uc138\ud788 \uc124\uba85\ud558\ub3c4\ub85d … \ub354 \ubcf4\uae30 “22.\ud45c\ubcf8 \ud06c\uae30(Sample Size)\uc640 \ud45c\ubcf8 \uc624\ucc28(Sampling Error), \ud45c\ubcf8 \ud06c\uae30\uc5d0 \ub530\ub978 \ud45c\ubcf8 \uc624\ucc28 \uac1c\ub150”<\/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-40784","post","type-post","status-publish","format-standard","hentry","category-219"],"yoast_head":"\n22.\ud45c\ubcf8 \ud06c\uae30(Sample Size)\uc640 \ud45c\ubcf8 \uc624\ucc28(Sampling Error), \ud45c\ubcf8 \ud06c\uae30\uc5d0 \ub530\ub978 \ud45c\ubcf8 \uc624\ucc28 \uac1c\ub150 - 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