{"id":1147,"date":"2023-07-27T12:12:52","date_gmt":"2023-07-27T12:12:52","guid":{"rendered":"https:\/\/statorials.org\/ko\/%e1%84%91%e1%85%a7%e1%86%ab%e1%84%92%e1%85%a3%e1%86%bc-%e1%84%87%e1%85%ae%e1%86%ab%e1%84%89%e1%85%a1%e1%86%ab-%e1%84%8c%e1%85%a5%e1%86%af%e1%84%8e%e1%85%ae%e1%86%bc\/"},"modified":"2023-07-27T12:12:52","modified_gmt":"2023-07-27T12:12:52","slug":"%e1%84%91%e1%85%a7%e1%86%ab%e1%84%92%e1%85%a3%e1%86%bc-%e1%84%87%e1%85%ae%e1%86%ab%e1%84%89%e1%85%a1%e1%86%ab-%e1%84%8c%e1%85%a5%e1%86%af%e1%84%8e%e1%85%ae%e1%86%bc","status":"publish","type":"post","link":"https:\/\/statorials.org\/ko\/%e1%84%91%e1%85%a7%e1%86%ab%e1%84%92%e1%85%a3%e1%86%bc-%e1%84%87%e1%85%ae%e1%86%ab%e1%84%89%e1%85%a1%e1%86%ab-%e1%84%8c%e1%85%a5%e1%86%af%e1%84%8e%e1%85%ae%e1%86%bc\/","title":{"rendered":"\uba38\uc2e0\ub7ec\ub2dd\uc758 \ud3b8\ud5a5-\ubd84\uc0b0 \ud2b8\ub808\uc774\ub4dc\uc624\ud504\ub294 \ubb34\uc5c7\uc778\uac00\uc694?"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\ub370\uc774\ud130 \uc138\ud2b8\uc5d0 \ub300\ud55c \ubaa8\ub378\uc758 \uc131\ub2a5\uc744 \ud3c9\uac00\ud558\ub824\uba74 \ubaa8\ub378\uc758 \uc608\uce21\uc774 \uad00\ucc30\ub41c \ub370\uc774\ud130\uc640 \uc5bc\ub9c8\ub098 \uc798 \uc77c\uce58\ud558\ub294\uc9c0 \uce21\uc815\ud574\uc57c \ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><a href=\"https:\/\/statorials.org\/ko\/\u1112\u116c\u1100\u1171-\u1103\u1162-\u1107\u116e\u11ab\u1105\u1172\/\" target=\"_blank\" rel=\"noopener noreferrer\">\ud68c\uadc0 \ubaa8\ub378<\/a> \uc758 \uacbd\uc6b0 \uac00\uc7a5 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \uce21\uc815\ud56d\ubaa9\uc740 \ud3c9\uade0 \uc81c\uacf1 \uc624\ucc28(MSE)\uc774\uba70 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">MSE = (1\/n)*\u03a3(y <sub>i<\/sub> \u2013 f( <sub>xi<\/sub> )) <sup>2<\/sup><\/span><\/p>\n<p> <span style=\"color: #000000;\">\uae08:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>n:<\/strong> \ucd1d \uad00\uce21\uce58 \uc218<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>y <sub>i<\/sub> :<\/strong> <sup>i\ubc88\uc9f8<\/sup> \uad00\uce21\uac12\uc758 \uc751\ub2f5 \uac12<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>f(x <sub>i<\/sub> ):<\/strong> i <sup>\ubc88\uc9f8<\/sup> \uad00\uce21\uce58\uc758 \uc608\uce21 \ubc18\uc751 \uac12<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">\ubaa8\ub378 \uc608\uce21\uc774 \uad00\uce21\uac12\uc5d0 \uac00\uae4c\uc6b8\uc218\ub85d MSE\ub294 \ub0ae\uc544\uc9d1\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uadf8\ub7ec\ub098 \uc6b0\ub9ac\ub294 <strong>MSE \ud14c\uc2a4\ud2b8<\/strong> , \uc989 \ubaa8\ub378\uc774 \ubcf4\uc774\uc9c0 \uc54a\ub294 \ub370\uc774\ud130\uc5d0 \uc801\uc6a9\ub420 \ub54c\uc758 MSE\uc5d0\ub9cc \uad00\uc2ec\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \uae30\uc874 \ub370\uc774\ud130\uac00 \uc544\ub2cc \uc54c\ub824\uc9c0\uc9c0 \uc54a\uc740 \ub370\uc774\ud130\uc5d0\uc11c \ubaa8\ub378\uc774 \uc5b4\ub5bb\uac8c \uc791\ub3d9\ud558\ub294\uc9c0\uc5d0\ub9cc \uad00\uc2ec\uc774 \uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc608\ub97c \ub4e4\uc5b4, \uc8fc\uac00\ub97c \uc608\uce21\ud558\ub294 \ubaa8\ub378\uc774 \uacfc\uac70 \ub370\uc774\ud130\uc5d0 \ub300\ud55c MSE\uac00 \ub0ae\ub2e4\uba74 \uad1c\ucc2e\uc9c0 <em>\ub9cc<\/em> \uc6b0\ub9ac\ub294 \uc774 \ubaa8\ub378\uc744 \uc0ac\uc6a9\ud558\uc5ec \ubbf8\ub798 \ub370\uc774\ud130\ub97c \uc815\ud655\ud558\uac8c \uc608\uce21\ud560 \uc218 \uc788\uae30\ub97c \uc6d0\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">MSE \ud14c\uc2a4\ud2b8\ub294 \uc5ec\uc804\ud788 \ub450 \ubd80\ubd84\uc73c\ub85c \ub098\ub20c \uc218 \uc788\ub294 \uac83\uc73c\ub85c \ub098\ud0c0\ub0ac\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>(1) \ubd84\uc0b0:<\/strong> \ub2e4\ub978 \ud6c8\ub828 \uc138\ud2b8\ub97c \uc0ac\uc6a9\ud558\uc5ec \ucd94\uc815\ud55c \uacbd\uc6b0 \ud568\uc218 <em>f\uac00<\/em> \ubcc0\uacbd\ub420 \uc591\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>(2) \ud3b8\ud5a5:<\/strong> \ub9e4\uc6b0 \ubcf5\uc7a1\ud560 \uc218 \uc788\ub294 \uc2e4\uc81c \ubb38\uc81c\ub97c \ud6e8\uc52c \uac04\ub2e8\ud55c \ubaa8\ub378\ub85c \uc811\uadfc\ud568\uc73c\ub85c\uc368 \ubc1c\uc0dd\ud558\ub294 \uc624\ub958\ub97c \ub9d0\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc218\ud559 \uc6a9\uc5b4\ub85c \uc791\uc131:<\/span><\/p>\n<p> <span style=\"color: #000000;\">MSE \uac80\uc815 = Var( <em class=\"ph i\">f\u0302(<\/em> x <sub>0<\/sub> )) + [\ubc14\uc774\uc5b4\uc2a4( <em class=\"ph i\">f\u0302(<\/em> x <sub>0<\/sub> ))] <sup>2<\/sup> + Var(\u03b5)<\/span><\/p>\n<p> <span style=\"color: #000000;\">MSE \ud14c\uc2a4\ud2b8 = \ubd84\uc0b0 + \ud3b8\ud5a5 <sup>2<\/sup> + \ube44\uac00\uc5ed \uc624\ub958<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc138 \ubc88\uc9f8 \ud56d\uc778 \ud658\uc6d0 \ubd88\uac00\ub2a5\ud55c \uc624\ub958\ub294 \uc124\uba85 \ubcc0\uc218 \uc9d1\ud569\uacfc <a href=\"https:\/\/statorials.org\/ko\/\u1107\u1167\u11ab\u1109\u116e-\u1109\u1165\u11af\u1106\u1167\u11bc-\u110b\u1173\u11bc\u1103\u1161\u11b8\/\" target=\"_blank\" rel=\"noopener noreferrer\">\uc751\ub2f5 \ubcc0\uc218<\/a> \uac04\uc758 \uad00\uacc4\uc5d0 \ud56d\uc0c1 <em>\uc7a1\uc74c\uc774<\/em> \uc788\uae30 \ub54c\ubb38\uc5d0 \uc5b4\ub5a4 \ubaa8\ub378\ub85c\ub3c4 \uc904\uc77c \uc218 \uc5c6\ub294 \uc624\ub958\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>\ud3b8\ud5a5\uc774 \ub192\uc740<\/strong> \ubaa8\ub378\uc740 <strong>\ubd84\uc0b0\uc774 \ub0ae\uc740 \uacbd\ud5a5\uc774<\/strong> \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc120\ud615 \ud68c\uadc0 \ubaa8\ub378\uc740 \ub192\uc740 \ud3b8\ud5a5(\uc124\uba85 \ubcc0\uc218\uc640 \uc751\ub2f5 \ubcc0\uc218 \uc0ac\uc774\uc758 \ub2e8\uc21c\ud55c \uc120\ud615 \uad00\uacc4\ub97c \uac00\uc815)\uacfc \ub0ae\uc740 \ubd84\uc0b0(\ubaa8\ub378 \ucd94\uc815\uce58\uac00 \ud45c\ubcf8\ub9c8\ub2e4 \ud06c\uac8c \ubcc0\ud558\uc9c0 \uc54a\uc74c)\uc744 \uac16\ub294 \uacbd\ud5a5\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\ub978).<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uadf8\ub7ec\ub098 <strong>\ud3b8\ud5a5\uc774 \ub0ae\uc740<\/strong> \ubaa8\ub378\uc740 \ubd84\uc0b0 <strong>\uc774 \ub192\uc740 \uacbd\ud5a5\uc774<\/strong> \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ubcf5\uc7a1\ud55c \ube44\uc120\ud615 \ubaa8\ub378\uc740 \ud3b8\ud5a5\uc774 \ub0ae\uace0(\uc124\uba85 \ubcc0\uc218\uc640 \uc751\ub2f5 \ubcc0\uc218 \uac04\uc758 \ud2b9\uc815 \uad00\uacc4\ub97c \uac00\uc815\ud558\uc9c0 \uc54a\uc74c) \ubd84\uc0b0\uc774 \ub192\uc740 \uacbd\ud5a5\uc774 \uc788\uc2b5\ub2c8\ub2e4(\ubaa8\ub378 \ucd94\uc815\uce58\ub294 \ud559\uc2b5 \uc0d8\ud50c\uc5d0\uc11c \ub2e4\ub978 \ud559\uc2b5 \uc0d8\ud50c\ub85c \ud06c\uac8c \ubcc0\uacbd\ub420 \uc218 \uc788\uc74c).<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>\ud3b8\ud5a5-\ubd84\uc0b0 \ud2b8\ub808\uc774\ub4dc\uc624\ud504<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\"><strong>\ud3b8\ud5a5-\ubd84\uc0b0 \ud2b8\ub808\uc774\ub4dc\uc624\ud504(bias-variance trade-off)<\/strong> \ub294 \ud3b8\ud5a5\uc744 \uac10\uc18c\uc2dc\ucf1c \uc77c\ubc18\uc801\uc73c\ub85c \ubd84\uc0b0\uc744 \uc99d\uac00\uc2dc\ud0a4\uac70\ub098 \ubd84\uc0b0\uc744 \uac10\uc18c\uc2dc\ucf1c \uc77c\ubc18\uc801\uc73c\ub85c \ud3b8\ud5a5\uc744 \uc99d\uac00\uc2dc\ud0a4\ub3c4\ub85d \uc120\ud0dd\ud560 \ub54c \ubc1c\uc0dd\ud558\ub294 \ud2b8\ub808\uc774\ub4dc\uc624\ud504\ub97c \uc758\ubbf8\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \uadf8\ub798\ud504\ub294 \uc774\ub7ec\ud55c \uade0\ud615\uc744 \uc2dc\uac01\ud654\ud558\ub294 \ubc29\ubc95\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11515 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/biais_variance1.png\" alt=\"\ud3b8\ud5a5-\ubd84\uc0b0 \ud2b8\ub808\uc774\ub4dc\uc624\ud504\" width=\"551\" height=\"400\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">\uc804\uccb4 \uc624\ub958\ub294 \ubaa8\ub378\uc758 \ubcf5\uc7a1\uc131\uc774 \uc99d\uac00\ud568\uc5d0 \ub530\ub77c \uac10\uc18c\ud558\uc9c0\ub9cc \ud2b9\uc815 \uc9c0\uc810\uae4c\uc9c0\ub9cc \uac00\ub2a5\ud569\ub2c8\ub2e4. \ud2b9\uc815 \uc9c0\uc810\uc744 \ub118\uc5b4\uc11c\uba74 \ubd84\uc0b0\uc774 \uc99d\uac00\ud558\uae30 \uc2dc\uc791\ud558\uace0 \uc804\uccb4 \uc624\ub958\ub3c4 \uc99d\uac00\ud558\uae30 \uc2dc\uc791\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc2e4\uc81c\ub85c \uc6b0\ub9ac\ub294 \ubaa8\ub378\uc758 \uc804\uccb4 \uc624\ub958\ub97c \ucd5c\uc18c\ud654\ud558\ub294 \ub370\uc5d0\ub9cc \uad00\uc2ec\uc774 \uc788\uc73c\uba70 \ubd84\uc0b0\uc774\ub098 \ud3b8\ud5a5\uc744 \ubc18\ub4dc\uc2dc \ucd5c\uc18c\ud654\ud558\ub294 \uac83\uc740 \uc544\ub2d9\ub2c8\ub2e4.<\/span> <span style=\"color: #000000;\">\ucd1d \uc624\ub958\ub97c \ucd5c\uc18c\ud654\ud558\ub294 \ubc29\ubc95\uc740 \ubd84\uc0b0\uacfc \ud3b8\ud5a5 \uc0ac\uc774\uc758 \uc62c\ubc14\ub978 \uade0\ud615\uc744 \ucc3e\ub294 \uac83\uc784\uc774 \ubc1d\ud600\uc84c\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc989, \uc6b0\ub9ac\ub294 \uc124\uba85 \ubcc0\uc218\uc640 \uc751\ub2f5 \ubcc0\uc218 \uc0ac\uc774\uc758 \uc2e4\uc81c \uad00\uacc4\ub97c \ud3ec\ucc29\ud560 \uc218 \uc788\uc744 \ub9cc\ud07c \ucda9\ubd84\ud788 \ubcf5\uc7a1\ud558\uc9c0\ub9cc \uc2e4\uc81c\ub85c \uc874\uc7ac\ud558\uc9c0 \uc54a\ub294 \ud328\ud134\uc744 \uac10\uc9c0\ud560 \ub9cc\ud07c \ub108\ubb34 \ubcf5\uc7a1\ud558\uc9c0\ub294 \uc54a\uc740 \ubaa8\ub378\uc744 \uc6d0\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ubaa8\ub378\uc774 \ub108\ubb34 \ubcf5\uc7a1\ud558\uba74 \ub370\uc774\ud130 <a href=\"https:\/\/statorials.org\/ko\/\u1106\u1165\u1109\u1175\u11ab\u1105\u1165\u1102\u1175\u11bc-\u1100\u116a\u110c\u1165\u11a8\u1112\u1161\u11b8\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>\uc5d0 \uacfc\uc801\ud569\ub429\ub2c8\ub2e4<\/strong><\/a> . \uc774\ub294 \ud6c8\ub828 \ub370\uc774\ud130\uc5d0\uc11c \ub2e8\uc21c\ud788 \uc6b0\uc5f0\ud788 \ubc1c\uc0dd\ud55c \ud328\ud134\uc744 \ucc3e\ub294 \uac83\uc774 \ub108\ubb34 \uc5b4\ub835\uae30 \ub54c\ubb38\uc5d0 \ubc1c\uc0dd\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc720\ud615\uc758 \ubaa8\ub378\uc740 \ubcf4\uc774\uc9c0 \uc54a\ub294 \ub370\uc774\ud130\uc5d0\uc11c\ub294 \uc131\ub2a5\uc774 \uc800\ud558\ub420 \uac00\ub2a5\uc131\uc774 \ub192\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uadf8\ub7ec\ub098 \ubaa8\ub378\uc774 \ub108\ubb34 \ub2e8\uc21c\ud558\uba74 \ub370\uc774\ud130\ub97c <strong>\uacfc\uc18c\ud3c9\uac00\ud558\uac8c \ub429\ub2c8\ub2e4<\/strong> . \uc774\ub294 \uc124\uba85 \ubcc0\uc218\uc640 \ubc18\uc751 \ubcc0\uc218 \uac04\uc758 \uc2e4\uc81c \uad00\uacc4\uac00 \uc2e4\uc81c\ubcf4\ub2e4 \ub354 \ub2e8\uc21c\ud558\ub2e4\uace0 \uac00\uc815\ud558\uae30 \ub54c\ubb38\uc5d0 \ubc1c\uc0dd\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uba38\uc2e0\ub7ec\ub2dd\uc5d0\uc11c \ucd5c\uc801\uc758 \ubaa8\ub378\uc744 \uc120\ud0dd\ud558\ub294 \ubc29\ubc95\uc740 \ud3b8\ud5a5\uacfc \ubd84\uc0b0 \uc0ac\uc774\uc758 \uade0\ud615\uc744 \ucc3e\uc544 \ubbf8\ub798\uc5d0 \ubcf4\uc774\uc9c0 \uc54a\ub294 \ub370\uc774\ud130\uc5d0 \ub300\ud574 \ubaa8\ub378\uc744 \ud14c\uc2a4\ud2b8\ud560 \ub54c \ubc1c\uc0dd\ud558\ub294 \uc624\ub958\ub97c \ucd5c\uc18c\ud654\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc2e4\uc81c\ub85c \ud14c\uc2a4\ud2b8\uc758 MSE\ub97c \ucd5c\uc18c\ud654\ud558\ub294 \uac00\uc7a5 \uc77c\ubc18\uc801\uc778 \ubc29\ubc95\uc740 <a href=\"https:\/\/statorials.org\/ko\/k-\u1100\u1167\u11b8-\u1100\u116d\u110e\u1161-\u1100\u1165\u11b7\u110c\u1173\u11bc\/\" target=\"_blank\" rel=\"noopener noreferrer\">\uad50\ucc28 \uac80\uc99d\uc744<\/a> \uc0ac\uc6a9\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ub370\uc774\ud130 \uc138\ud2b8\uc5d0 \ub300\ud55c \ubaa8\ub378\uc758 \uc131\ub2a5\uc744 \ud3c9\uac00\ud558\ub824\uba74 \ubaa8\ub378\uc758 \uc608\uce21\uc774 \uad00\ucc30\ub41c \ub370\uc774\ud130\uc640 \uc5bc\ub9c8\ub098 \uc798 \uc77c\uce58\ud558\ub294\uc9c0 \uce21\uc815\ud574\uc57c \ud569\ub2c8\ub2e4. \ud68c\uadc0 \ubaa8\ub378 \uc758 \uacbd\uc6b0 \uac00\uc7a5 \uc77c\ubc18\uc801\uc73c\ub85c \uc0ac\uc6a9\ub418\ub294 \uce21\uc815\ud56d\ubaa9\uc740 \ud3c9\uade0 \uc81c\uacf1 \uc624\ucc28(MSE)\uc774\uba70 \ub2e4\uc74c\uacfc \uac19\uc774 \uacc4\uc0b0\ub429\ub2c8\ub2e4. MSE = (1\/n)*\u03a3(y i \u2013 f( xi )) 2 \uae08: n: \ucd1d \uad00\uce21\uce58 \uc218 y i : i\ubc88\uc9f8 \uad00\uce21\uac12\uc758 \uc751\ub2f5 \uac12 f(x i ): i \ubc88\uc9f8 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-1147","post","type-post","status-publish","format-standard","hentry","category-20"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\uba38\uc2e0\ub7ec\ub2dd\uc758 \ud3b8\ud5a5-\ubd84\uc0b0 \ud2b8\ub808\uc774\ub4dc\uc624\ud504\ub294 \ubb34\uc5c7\uc778\uac00\uc694?<\/title>\n<meta name=\"description\" content=\"\uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 \uc608\uc81c\ub97c \ud3ec\ud568\ud558\uc5ec \uae30\uacc4 \ud559\uc2b5\uc758 \ud3b8\ud5a5-\ubd84\uc0b0 \uade0\ud615\uc5d0 \ub300\ud55c 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