{"id":40770,"date":"2024-11-04T12:20:21","date_gmt":"2024-11-04T12:20:21","guid":{"rendered":"https:\/\/atmokpo.com\/w\/?p=40770"},"modified":"2024-11-26T06:38:30","modified_gmt":"2024-11-26T06:38:30","slug":"17-%ec%8b%a0%eb%a2%b0-%ea%b5%ac%ea%b0%84confidence-interval-%ed%8f%89%ea%b7%a0%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-%ec%8b%a0%eb%a2%b0-%ea%b5%ac","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/40770\/","title":{"rendered":"17.\uc2e0\ub8b0 \uad6c\uac04(Confidence Interval), \ud3c9\uade0\uacfc \ud45c\uc900\ud3b8\ucc28\ub97c \uc774\uc6a9\ud55c \uc2e0\ub8b0 \uad6c\uac04 \uacc4\uc0b0"},"content":{"rendered":"<h2>\uc2e0\ub8b0 \uad6c\uac04 (Confidence Interval)<\/h2>\n<p>\ud1b5\uacc4\ud559\uc5d0\uc11c \uc2e0\ub8b0 \uad6c\uac04\uc740 \ubaa8\uc9d1\ub2e8\uc758 \ud30c\ub77c\ubbf8\ud130(\uc608: \ud3c9\uade0 \ub610\ub294 \ube44\uc728)\uc5d0 \ub300\ud55c \ucd94\uc815\uac12\uc758 \uc2e0\ub8b0\uc131\uc744 \ud3c9\uac00\ud558\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc2e0\ub8b0 \uad6c\uac04\uc740 \uc810 \ucd94\uc815\uce58 \uc8fc\uc704\uc758 \ubc94\uc704\ub85c\uc11c, \ud2b9\uc815 \ud655\ub960(confidence level)\ub85c \ud574\ub2f9 \ubc94\uc704 \uc548\uc5d0 \uc2e4\uc81c \ubaa8\uc9d1\ub2e8\uc758 \ud30c\ub77c\ubbf8\ud130\uac00 \uc874\uc7ac\ud560 \uac83\uc774\ub77c\ub294 \uac00\ub2a5\uc131\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \uc2e0\ub8b0 \uad6c\uac04\uc740 95% \ub610\ub294 99%\uc758 \uc2e0\ub8b0 \uc218\uc900\uc73c\ub85c \uc124\uc815\ub429\ub2c8\ub2e4.<\/p>\n<h3>1. \uc2e0\ub8b0 \uad6c\uac04\uc758 \uc815\uc758<\/h3>\n<p>\uc2e0\ub8b0 \uad6c\uac04\uc740 \uc8fc\uc5b4\uc9c4 \uc2e0\ub8b0 \uc218\uc900\uc5d0\uc11c \ubaa8\uc9d1\ub2e8\uc758 \ud2b9\uc815 \ud30c\ub77c\ubbf8\ud130\uac00 \ud3ec\ud568\ub420 \uac83\uc73c\ub85c \uc608\uc0c1\ub418\ub294 \uac12\uc758 \ubc94\uc704\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, 95%\uc758 \uc2e0\ub8b0 \uad6c\uac04\uc744 \uc81c\uacf5\ud55c\ub2e4\uace0 \ud560 \ub54c, \uc774\ub294 \ud574\ub2f9 \uad6c\uac04 \ub0b4\uc5d0 \uc2e4\uc81c \ubaa8\uc9d1\ub2e8\uc758 \ud30c\ub77c\ubbf8\ud130\uac00 95%\uc758 \ud655\ub960\ub85c \uc874\uc7ac\ud568\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\n<h3>2. \uc2e0\ub8b0 \uad6c\uac04\uc758 \uacc4\uc0b0<\/h3>\n<p>\uc2e0\ub8b0 \uad6c\uac04\uc744 \uacc4\uc0b0\ud558\uae30 \uc704\ud574 \ud544\uc694\ud55c \uc694\uc18c\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<ul>\n<li>\ud45c\ubcf8 \ud3c9\uade0 (\\( \\bar{x} \\))<\/li>\n<li>\ud45c\ubcf8\uc758 \ud45c\uc900\ud3b8\ucc28 (\\( s \\))<\/li>\n<li>\ud45c\ubcf8 \ud06c\uae30 (\\( n \\))<\/li>\n<li>\uc2e0\ub8b0 \uc218\uc900\uc5d0 \ub530\ub978 z \uac12 \ub610\ub294 t \uac12<\/li>\n<\/ul>\n<h3>3. \ud3c9\uade0\uc744 \uc774\uc6a9\ud55c \uc2e0\ub8b0 \uad6c\uac04<\/h3>\n<p>\ubaa8\uc9d1\ub2e8\uc758 \ud3c9\uade0\uc5d0 \ub300\ud55c \uc2e0\ub8b0 \uad6c\uac04\uc744 \uacc4\uc0b0\ud558\ub294 \uac00\uc7a5 \uae30\ubcf8\uc801\uc778 \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n<h4>3.1. \ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28\uac00 \uc54c\ub824\uc9c4 \uacbd\uc6b0<\/h4>\n<p>\ud45c\uc900\ud3b8\ucc28\uac00 \uc54c\ub824\uc9c4 \ubaa8\uc9d1\ub2e8\uc758 \ud3c9\uade0\uc5d0 \ub300\ud55c \uc2e0\ub8b0 \uad6c\uac04\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4:<\/p>\n<p>\n<b>\uc2e0\ub8b0\uad6c\uac04 = \\( \\bar{x} \\pm z \\cdot \\frac{\\sigma}{\\sqrt{n}} \\)<\/b>\n<\/p>\n<ul>\n<li>\\( \\bar{x} \\) : \ud45c\ubcf8 \ud3c9\uade0<\/li>\n<li>\\( z \\) : \uc2e0\ub8b0 \uc218\uc900\uc5d0 \ub530\ub978 z \uac12 (\uc608: 95% \uc2e0\ub8b0 \uc218\uc900\uc77c \ub54c z = 1.96)<\/li>\n<li>\\( \\sigma \\) : \ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28<\/li>\n<li>\\( n \\) : \ud45c\ubcf8 \ud06c\uae30<\/li>\n<\/ul>\n<h4>3.2. \ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28\uac00 \uc54c\ub824\uc9c0\uc9c0 \uc54a\uc740 \uacbd\uc6b0<\/h4>\n<p>\ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28\uac00 \uc54c\ub824\uc9c0\uc9c0 \uc54a\ub294 \uacbd\uc6b0, t \ubd84\ud3ec\ub97c \uc0ac\uc6a9\ud558\uc5ec \uc2e0\ub8b0 \uad6c\uac04\uc744 \uacc4\uc0b0\ud569\ub2c8\ub2e4:<\/p>\n<p>\n<b>\uc2e0\ub8b0\uad6c\uac04 = \\( \\bar{x} \\pm t \\cdot \\frac{s}{\\sqrt{n}} \\)<\/b>\n<\/p>\n<ul>\n<li>\\( s \\) : \ud45c\ubcf8\uc758 \ud45c\uc900\ud3b8\ucc28<\/li>\n<li>\\( t \\) : \uc2e0\ub8b0 \uc218\uc900\uc5d0 \ub530\ub978 t \uac12 (\uc790\uc720\ub3c4 \\( n &#8211; 1 \\)\uc5d0 \uae30\ubc18)<\/li>\n<\/ul>\n<h3>4. \uc2e0\ub8b0 \uad6c\uac04 \uacc4\uc0b0 \uc608\uc81c<\/h3>\n<h4>4.1. \ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28\uac00 \uc54c\ub824\uc9c4 \uacbd\uc6b0<\/h4>\n<p>\uc608\ub97c \ub4e4\uc5b4, \uc5b4\ub5a4 \uc5f0\uad6c\uc790\uac00 \ud3c9\uade0 \ud0a4\uac00 170cm\uc778 \ub0a8\uc131 \uc9d1\ub2e8\uc744 \ub300\uc0c1\uc73c\ub85c \ud0a4\uc758 \ud3c9\uade0 \uc2e0\ub8b0 \uad6c\uac04\uc744 95% \uc218\uc900\uc5d0\uc11c \uacc4\uc0b0\ud558\uace0\uc790 \ud55c\ub2e4\uace0 \uac00\uc815\ud569\uc2dc\ub2e4. \ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28\ub294 10cm, \ud45c\ubcf8 \ud06c\uae30\ub294 30\uba85\uc73c\ub85c \uc124\uc815\ud569\ub2c8\ub2e4.<\/p>\n<p>\uba3c\uc800, \ud45c\ubcf8 \ud3c9\uade0\uc744 \uad6c\ud569\ub2c8\ub2e4.<\/p>\n<p>\n<b>\uc2e0\ub8b0\uad6c\uac04 = \\( 170 \\pm 1.96 \\cdot \\frac{10}{\\sqrt{30}} \\)<\/b>\n<\/p>\n<p>\uc704\uc758 \uc2dd\uc744 \uc774\uc6a9\ud558\uc5ec \uc2e0\ub8b0 \uad6c\uac04\uc744 \uacc4\uc0b0\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<h4>4.2. \ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28\uac00 \uc54c\ub824\uc9c0\uc9c0 \uc54a\uc740 \uacbd\uc6b0<\/h4>\n<p>\uc774\ubc88 \uc608\uc81c\uc5d0\uc11c\ub294 \ubaa8\uc9d1\ub2e8\uc758 \ud45c\uc900\ud3b8\ucc28\uac00 \uc54c\ub824\uc9c0\uc9c0 \uc54a\uc558 but \ud3b8\ub2f9 \ud3c9\uade0 \ud0a4\uac00 172cm\uc774\uace0, \ud45c\uc900\ud3b8\ucc28\uac00 8cm\uc778 25\uba85\uc758 \ud45c\ubcf8\uc744 \uace0\ub824\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc2e0\ub8b0 \uc218\uc900\uc744 95%\ub85c \uc124\uc815\ud558\uace0, \uc790\uc720\ub3c4\ub294 \\( n &#8211; 1 = 25 &#8211; 1 = 24 \\)\ub85c \uc124\uc815\ud569\ub2c8\ub2e4. t \ubd84\ud3ec\uc5d0\uc11c t \uac12\uc744 \ucc3e\uc2b5\ub2c8\ub2e4.<\/p>\n<p>\uc2e0\ub8b0\uad6c\uac04\uc744 \uacc4\uc0b0\ud574\ubcf4\uaca0\uc2b5\ub2c8\ub2e4:<\/p>\n<p>\n<b>\uc2e0\ub8b0\uad6c\uac04 = \\( 172 \\pm t_{0.025, 24} \\cdot \\frac{8}{\\sqrt{25}} \\)<\/b>\n<\/p>\n<h3>5. \uc2e0\ub8b0 \uad6c\uac04\uc758 \ud574\uc11d<\/h3>\n<p>\uacc4\uc0b0\ub41c \uc2e0\ub8b0 \uad6c\uac04\uc740 \ubaa8\uc9d1\ub2e8 \ud3c9\uade0\uc758 \uc2e0\ub8b0 \uad6c\uac04\uc73c\ub85c \ud574\uc11d\ub418\uba70, \uc774\ub294 \uc6b0\ub9ac\uac00 \uc120\ubcc4\ud55c \ud45c\ubcf8\uc774 \ubaa8\uc9d1\ub2e8\uc744 \ub300\ud45c\ud558\uc5ec \ud574\ub2f9 \uc2e0\ub8b0 \uad6c\uac04 \ub0b4\uc5d0 \uc2e4\uc81c \ud3c9\uade0\uc774 \uc874\uc7ac\ud560 \ud655\ub960\uc774 \uc788\uc74c\uc744 \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/p>\n<h3>6. \uc2e0\ub8b0 \uad6c\uac04\uc758 \uc911\uc694\uc131<\/h3>\n<p>\uc2e0\ub8b0 \uad6c\uac04\uc740 \ud1b5\uacc4 \ub370\uc774\ud130\uc758 \uc2e0\ub8b0\uc131\uc744 \uc81c\uacf5\ud568\uc73c\ub85c\uc368 \uc5f0\uad6c \uacb0\uacfc\ub97c \ud574\uc11d\ud558\uace0 \uacb0\uc815\ud558\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ud2b9\uc815 \uc57d\ubb3c\uc758 \ud6a8\uacfc\ub97c \uc5f0\uad6c\ud558\ub294 \uacbd\uc6b0, \uc5f0\uad6c\uc790\uac00 \uc57d\ubb3c\uc758 \ud3c9\uade0 \ud6a8\uacfc\uc5d0 \ub300\ud55c \uc2e0\ub8b0 \uad6c\uac04\uc744 \uc81c\uacf5\ud568\uc73c\ub85c\uc368, \uadf8 \uc57d\ubb3c\uc5d0 \ub300\ud55c \uc2e0\ub8b0\uc131\uc744 \uc81c\uacf5\ud558\uace0, \uc815\ucc45 \uacb0\uc815\uc790\ub4e4\uc774 \uc5b4\ub5a4 \uacb0\uc815\uc744 \ub0b4\ub9b4 \ub54c \ud544\uc694\ud55c \uc815\ubcf4\ub97c \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/p>\n<h3>7. \uacb0\ub860<\/h3>\n<p>\uc2e0\ub8b0 \uad6c\uac04\uc740 \ud1b5\uacc4\uc801 \ucd94\uc815\uc744 \uc720\uc6a9\ud558\uac8c \uc9c0\uc6d0\ud558\ub294 \ub3c4\uad6c\ub85c, \ud45c\ubcf8 \ub370\uc774\ud130\ub97c \uae30\ubc18\uc73c\ub85c \ubaa8\uc9d1\ub2e8\uc5d0 \ub300\ud55c \uacb0\ub860\uc744 \ub3c4\ucd9c\ud558\ub294\ub370 \ub3c4\uc6c0\uc744 \uc90d\ub2c8\ub2e4. \ud45c\ubcf8 \ub370\uc774\ud130\uc758 \ubcc0\ub3d9\uc131\uacfc \ubd88\ud655\uc2e4\uc131\uc744 \ubc18\uc601\ud558\uace0 \uc788\uc73c\uba70, \uc774\ub7ec\ud55c \uc815\ubcf4\ub97c \ud1b5\ud574 \uacfc\ud559\uc801 \ubc1c\uacac\uacfc \uc0ac\ud68c\uc801 \uc815\ucc45\uc758 \uae30\ucd08\ub97c \ub9c8\ub828\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h3>8. \ucc38\uace0 \ubb38\ud5cc<\/h3>\n<p>&#8211; Moore, D. S., McCabe, G. P., &amp; Craig, B. A. (2018). Introduction to the Practice of Statistics. W. H. Freeman.<\/p>\n<p>&#8211; Blaise, C. K. (2015). Understanding Statistical Confidence Intervals: A Primer. Journal of Statistics Education.<\/p>\n<p>&#8211; Montgomery, D. C., &amp; Runger, G. C. (2010). Applied Statistics and Probability for Engineers. John Wiley &amp; Sons.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc2e0\ub8b0 \uad6c\uac04 (Confidence Interval) \ud1b5\uacc4\ud559\uc5d0\uc11c \uc2e0\ub8b0 \uad6c\uac04\uc740 \ubaa8\uc9d1\ub2e8\uc758 \ud30c\ub77c\ubbf8\ud130(\uc608: \ud3c9\uade0 \ub610\ub294 \ube44\uc728)\uc5d0 \ub300\ud55c \ucd94\uc815\uac12\uc758 \uc2e0\ub8b0\uc131\uc744 \ud3c9\uac00\ud558\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc2e0\ub8b0 \uad6c\uac04\uc740 \uc810 \ucd94\uc815\uce58 \uc8fc\uc704\uc758 \ubc94\uc704\ub85c\uc11c, \ud2b9\uc815 \ud655\ub960(confidence level)\ub85c \ud574\ub2f9 \ubc94\uc704 \uc548\uc5d0 \uc2e4\uc81c \ubaa8\uc9d1\ub2e8\uc758 \ud30c\ub77c\ubbf8\ud130\uac00 \uc874\uc7ac\ud560 \uac83\uc774\ub77c\ub294 \uac00\ub2a5\uc131\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \uc2e0\ub8b0 \uad6c\uac04\uc740 95% \ub610\ub294 99%\uc758 \uc2e0\ub8b0 \uc218\uc900\uc73c\ub85c \uc124\uc815\ub429\ub2c8\ub2e4. 1. \uc2e0\ub8b0 \uad6c\uac04\uc758 \uc815\uc758 \uc2e0\ub8b0 \uad6c\uac04\uc740 \uc8fc\uc5b4\uc9c4 &hellip; <a href=\"https:\/\/atmokpo.com\/w\/40770\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;17.\uc2e0\ub8b0 \uad6c\uac04(Confidence Interval), \ud3c9\uade0\uacfc \ud45c\uc900\ud3b8\ucc28\ub97c \uc774\uc6a9\ud55c \uc2e0\ub8b0 \uad6c\uac04 \uacc4\uc0b0&#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-40770","post","type-post","status-publish","format-standard","hentry","category-219"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - 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