{"id":813,"date":"2024-07-11T10:23:37","date_gmt":"2024-07-11T10:23:37","guid":{"rendered":"http:\/\/www.ohsumin.com\/?p=813"},"modified":"2025-06-11T01:23:00","modified_gmt":"2025-06-11T01:23:00","slug":"%ea%b0%80%eb%b3%80%ec%88%98-%ed%9a%8c%ea%b7%80%eb%b6%84%ec%84%9d","status":"publish","type":"post","link":"http:\/\/www.inmining.co.kr\/?p=813","title":{"rendered":"\uac00\ubcc0\uc218 \ud68c\uadc0\ubd84\uc11d(Dummy Regression)"},"content":{"rendered":"\n

\uac00\ubcc0\uc218 \ud68c\uadc0\ubd84\uc11d(Dummy Variable Regression)\uc740 \ubc94\uc8fc\ud615 \ubcc0\uc218\ub97c \ud68c\uadc0 \ubd84\uc11d\uc5d0 \ud3ec\ud568\ud558\uae30 \uc704\ud574 \uac00\ubcc0\uc218\ub97c \uc0ac\uc6a9\ud558\ub294 \uae30\ubc95\uc785\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \ubc94\uc8fc\ud615 \ub370\uc774\ud130\ub97c \uc218\uce58\ud615 \ub370\uc774\ud130\ub85c \ubcc0\ud658\ud558\uc5ec \ud68c\uadc0 \ubaa8\ub378\uc5d0 \ud3ec\ud568\ud560 \uc218 \uc788\uac8c \ud569\ub2c8\ub2e4.<\/p>\n\n\n\n

\\(\\)<\/p>\n\n\n\n

<\/span>\uac00\ubcc0\uc218(Dummy Variable)\ub780?<\/span><\/h3>\n\n\n\n

\uac00\ubcc0\uc218\ub294 \ubc94\uc8fc\ud615 \ubcc0\uc218\ub97c 0\uacfc 1\ub85c \ubcc0\ud658\ud55c \uc774\uc9c4 \ubcc0\uc218\uc785\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \uc131\ubcc4 \ubcc0\uc218\ub97c ‘\ub0a8\uc131’\uacfc ‘\uc5ec\uc131’\uc73c\ub85c \uad6c\ubd84\ud560 \ub54c, ‘\ub0a8\uc131’\uc740 1, ‘\uc5ec\uc131’\uc740 0\uc73c\ub85c \ucf54\ub529\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

<\/span>\uac00\ubcc0\uc218 \uc0dd\uc131 \ubc29\ubc95<\/span><\/h3>\n\n\n\n

\uac00\ubcc0\uc218\ub97c \uc0dd\uc131\ud558\ub294 \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4:<\/p>\n\n\n\n

    \n
  1. \ubc94\uc8fc\ud615 \ubcc0\uc218\uc758 \uac01 \ubc94\uc8fc\uc5d0 \ub300\ud574 \uc0c8\ub85c\uc6b4 \ubcc0\uc218\ub97c \uc0dd\uc131\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n
  2. \uac01 \ubc94\uc8fc\ub294 \ud574\ub2f9 \ubc94\uc8fc\uc5d0 \uc18d\ud558\uba74 1, \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 0\uc73c\ub85c \ucf54\ub529\ub429\ub2c8\ub2e4.<\/li>\n\n\n\n
  3. \\( k \\)\uac1c\uc758 \ubc94\uc8fc\ub97c \uac00\uc9c4 \ubcc0\uc218\uc758 \uacbd\uc6b0, \\( k-1 \\)\uac1c\uc758 \uac00\ubcc0\uc218\ub97c \uc0dd\uc131\ud558\uc5ec \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \uc774\ub294 \ub2e4\uc911\uacf5\uc120\uc131 \ubb38\uc81c\ub97c \ud53c\ud558\uae30 \uc704\ud574\uc11c\uc785\ub2c8\ub2e4.<\/li>\n<\/ol>\n\n\n\n

    <\/span>\uc608\uc2dc: \uac00\ubcc0\uc218 \ud68c\uadc0\ubd84\uc11d<\/span><\/h3>\n\n\n\n

    \uac00\ubcc0\uc218\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud68c\uadc0\ubd84\uc11d\uc744 \uc218\ud589\ud558\ub294 \uc608\uc2dc\ub97c \ub4e4\uc5b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

    \ub370\uc774\ud130\uc14b<\/h4>\n\n\n\n

    \ub2e4\uc74c\uc740 \uc0d8\ud50c \ub370\uc774\ud130\uc14b\uc785\ub2c8\ub2e4:<\/p>\n\n\n\n

    \ud559\uc0dd<\/th>\uc2dc\ud5d8 \uc810\uc218<\/th>\uc131\ubcc4<\/th><\/tr><\/thead>
    1<\/td>85<\/td>\ub0a8\uc131<\/td><\/tr>
    2<\/td>90<\/td>\uc5ec\uc131<\/td><\/tr>
    3<\/td>78<\/td>\uc5ec\uc131<\/td><\/tr>
    4<\/td>92<\/td>\ub0a8\uc131<\/td><\/tr>
    5<\/td>88<\/td>\uc5ec\uc131<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    \uc5ec\uae30\uc11c ‘\uc131\ubcc4’ \ubcc0\uc218\ub97c \uac00\ubcc0\uc218\ub85c \ubcc0\ud658\ud558\uc5ec \ud68c\uadc0\ubd84\uc11d\uc5d0 \ud3ec\ud568\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n

    \uac00\ubcc0\uc218 \uc0dd\uc131<\/h4>\n\n\n\n

    \uc131\ubcc4 \ubcc0\uc218\ub97c \uac00\ubcc0\uc218\ub85c \ubcc0\ud658\ud569\ub2c8\ub2e4:<\/p>\n\n\n\n

    \ud559\uc0dd<\/th>\uc2dc\ud5d8 \uc810\uc218<\/th>\ub0a8\uc131<\/th>\uc5ec\uc131<\/th><\/tr><\/thead>
    1<\/td>85<\/td>1<\/td>0<\/td><\/tr>
    2<\/td>90<\/td>0<\/td>1<\/td><\/tr>
    3<\/td>78<\/td>0<\/td>1<\/td><\/tr>
    4<\/td>92<\/td>1<\/td>0<\/td><\/tr>
    5<\/td>88<\/td>0<\/td>1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    \uc774\uc81c \uc5ec\uc131 \ubcc0\uc218\ub97c \uc81c\uc678\ud558\uace0 \ub0a8\uc131 \ubcc0\uc218\ub9cc \ud3ec\ud568\ud569\ub2c8\ub2e4(\uae30\uc900 \ubc94\uc8fc\ub85c \uc124\uc815):<\/p>\n\n\n\n

    \ud559\uc0dd<\/th>\uc2dc\ud5d8 \uc810\uc218<\/th>\ub0a8\uc131<\/th><\/tr><\/thead>
    1<\/td>85<\/td>1<\/td><\/tr>
    2<\/td>90<\/td>0<\/td><\/tr>
    3<\/td>78<\/td>0<\/td><\/tr>
    4<\/td>92<\/td>1<\/td><\/tr>
    5<\/td>88<\/td>0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    \ud68c\uadc0\ubd84\uc11d \uc218\ud589<\/h4>\n\n\n\n

    \uc774\uc81c \ud68c\uadc0\ubd84\uc11d \ubaa8\ub378\uc744 \ub9cc\ub4e4 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n\n\n\n

    \\[ \\text{\uc2dc\ud5d8 \uc810\uc218} = \\beta_0 + \\beta_1 \\times \\text{\ub0a8\uc131} + \\epsilon \\]<\/p>\n\n\n\n

    \uc5ec\uae30\uc11c:<\/p>\n\n\n\n

      \n
    • \\(\\beta_0\\): \uc5ec\uc131\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218<\/li>\n\n\n\n
    • \\(\\beta_1\\): \ub0a8\uc131\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218\uc640 \uc5ec\uc131\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218\uc758 \ucc28\uc774<\/li>\n<\/ul>\n\n\n\n

      <\/span>\ud30c\uc774\uc36c \ucf54\ub4dc \uc608\uc81c<\/span><\/h3>\n\n\n\n

      \ub2e4\uc74c\uc740 \ud30c\uc774\uc36c\uc744 \uc0ac\uc6a9\ud55c \uac00\ubcc0\uc218 \ud68c\uadc0\ubd84\uc11d\uc758 \uc608\uc81c\uc785\ub2c8\ub2e4:<\/p>\n\n\n\n

      import pandas as pd\nimport statsmodels.api as sm\n\n# \ub370\uc774\ud130 \uc0dd\uc131\ndata = {\n    '\ud559\uc0dd': [1, 2, 3, 4, 5],\n    '\uc2dc\ud5d8 \uc810\uc218': [85, 90, 78, 92, 88],\n    '\uc131\ubcc4': ['\ub0a8\uc131', '\uc5ec\uc131', '\uc5ec\uc131', '\ub0a8\uc131', '\uc5ec\uc131']\n}\n\ndf = pd.DataFrame(data)\n\n# \uac00\ubcc0\uc218 \uc0dd\uc131\ndf = pd.get_dummies(df, columns=['\uc131\ubcc4'], drop_first=True)\n\n# \ub3c5\ub9bd \ubcc0\uc218\uc640 \uc885\uc18d \ubcc0\uc218 \uc124\uc815\nX = df[['\uc131\ubcc4_\ub0a8\uc131']]\ny = df['\uc2dc\ud5d8 \uc810\uc218']\n\n# \uc0c1\uc218\ud56d \ucd94\uac00\nX = sm.add_constant(X)\n\n# \ud68c\uadc0\ubaa8\ub378 \uc801\ud569\nmodel = sm.OLS(y, X).fit()\n\n# \uacb0\uacfc \ucd9c\ub825\nprint(model.summary())<\/code><\/pre>\n\n\n\n
      \uc774 \uc608\uc81c\ub294 \ubc94\uc8fc\ud615 \ubcc0\uc218(\uc131\ubcc4)\ub97c \uac00\ubcc0\uc218\ub85c \ubcc0\ud658\ud558\uace0, \uc774\ub97c \uc0ac\uc6a9\ud558\uc5ec \ud68c\uadc0 \ubaa8\ub378\uc744 \uad6c\ucd95\ud558\ub294 \uacfc\uc815\uc744 \ubcf4\uc5ec\uc90d\ub2c8\ub2e4. \ud68c\uadc0 \ubaa8\ub378\uc758 \uacb0\uacfc\ub294 \uc131\ubcc4\uc774 \uc2dc\ud5d8 \uc810\uc218\uc5d0 \ubbf8\uce58\ub294 \uc601\ud5a5\uc744 \ud3c9\uac00\ud558\ub294 \ub370 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n
      <\/span>\uc608\uc81c 2 <\/span><\/h3>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      \uc704 \uadf8\ub9bc\uc740 \uac00\ubcc0\uc218 \ud68c\uadc0\ubd84\uc11d \uacb0\uacfc\ub97c \uc2dc\uac01\ud654\ud55c \uac83\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n
        \n
      • \ub370\uc774\ud130 \ud3ec\uc778\ud2b8<\/strong>: \ub0a8\uc131(\ube68\uac04\uc0c9)\uacfc \uc5ec\uc131(\ud30c\ub780\uc0c9)\uc758 \uc2dc\ud5d8 \uc810\uc218\ub97c \ud45c\uc2dc\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n
      • \ud68c\uadc0\uc120<\/strong>: \uac80\uc740 \uc810\uc120\uc740 \ub0a8\uc131 \uc5ec\ubd80\uc5d0 \ub530\ub77c \uc608\uce21\ub41c \uc2dc\ud5d8 \uc810\uc218\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ub0a8\uc131(1)\uc77c \ub54c\uc640 \uc5ec\uc131(0)\uc77c \ub54c\uc758 \ucc28\uc774\ub97c \ubcf4\uc5ec\uc90d\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n
        \ud68c\uadc0\ubd84\uc11d \uacb0\uacfc\uc5d0\uc11c \uc0c1\uc218\ud56d\\((\\beta_0)\\)\ub294 \uc5ec\uc131\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218\ub97c \ub098\ud0c0\ub0b4\uba70, \ub0a8\uc131 \ubcc0\uc218\uc758 \uacc4\uc218\\((\\beta_1)\\)\ub294 \ub0a8\uc131\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218\uc640 \uc5ec\uc131\uc758 \ud3c9\uade0 \uc2dc\ud5d8 \uc810\uc218\uc758 \ucc28\uc774\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \uc774 \uacbd\uc6b0, \ub0a8\uc131\uc758 \uc2dc\ud5d8 \uc810\uc218\ub294 \uc5ec\uc131\ubcf4\ub2e4 \ud3c9\uade0\uc801\uc73c\ub85c \uc57d\uac04 \ub354 \ub192\uc740 \uac83\uc73c\ub85c \ub098\ud0c0\ub0ac\uc2b5\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"
        \uac00\ubcc0\uc218 \ud68c\uadc0\ubd84\uc11d(Dummy Variable Regression)\uc740 \ubc94\uc8fc\ud615 \ubcc0\uc218\ub97c \ud68c\uadc0 \ubd84\uc11d\uc5d0 \ud3ec\ud568\ud558\uae30 \uc704\ud574 \uac00\ubcc0\uc218\ub97c \uc0ac\uc6a9\ud558\ub294 \uae30\ubc95\uc785\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \ubc94\uc8fc\ud615 \ub370\uc774\ud130\ub97c \uc218\uce58\ud615…<\/p>\n","protected":false},"author":1,"featured_media":929,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-813","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-stat","wpcat-6-id"],"_links":{"self":[{"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/813","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=813"}],"version-history":[{"count":5,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/813\/revisions"}],"predecessor-version":[{"id":961,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/813\/revisions\/961"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=\/wp\/v2\/media\/929"}],"wp:attachment":[{"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=813"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=813"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.inmining.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}