{"id":781,"date":"2023-07-28T18:44:38","date_gmt":"2023-07-28T18:44:38","guid":{"rendered":"https:\/\/statorials.org\/ko\/2%e1%84%8e%e1%85%a1-%e1%84%92%e1%85%ac%e1%84%80%e1%85%b1-r\/"},"modified":"2023-07-28T18:44:38","modified_gmt":"2023-07-28T18:44:38","slug":"2%e1%84%8e%e1%85%a1-%e1%84%92%e1%85%ac%e1%84%80%e1%85%b1-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/ko\/2%e1%84%8e%e1%85%a1-%e1%84%92%e1%85%ac%e1%84%80%e1%85%b1-r\/","title":{"rendered":"R\uc5d0\uc11c 2\ucc28 \ud68c\uadc0\ub97c \uc218\ud589\ud558\ub294 \ubc29\ubc95"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\ub450 \ubcc0\uc218\uac00 \uc120\ud615 \uad00\uacc4\ub97c \uac16\ub294 \uacbd\uc6b0 <a href=\"https:\/\/statorials.org\/ko\/r\u110b\u1174-\u1103\u1161\u11ab\u1109\u116e\u11ab-\u1109\u1165\u11ab\u1112\u1167\u11bc-\u1112\u116c\u1100\u1171\/\" target=\"_blank\" rel=\"noopener noreferrer\">\ub2e8\uc21c \uc120\ud615 \ud68c\uadc0\ub97c<\/a> \uc0ac\uc6a9\ud558\uc5ec \uad00\uacc4\ub97c \uc815\ub7c9\ud654\ud560 \uc218 \uc788\ub294 \uacbd\uc6b0\uac00 \ub9ce\uc2b5\ub2c8\ub2e4.<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-5772 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/quadregstata1.png\" sizes=\"auto, \" srcset=\"\" alt=\"\uc120\ud615 \uad00\uacc4\uc758 \uc608\" width=\"442\" height=\"318\"><\/p>\n<p> <span style=\"color: #000000;\">\uadf8\ub7ec\ub098 \ub450 \ubcc0\uc218\uac00 2\ucc28 \uad00\uacc4\ub97c \uac16\ub294 \uacbd\uc6b0 <strong>2\ucc28 \ud68c\uadc0\ub97c<\/strong> \uc0ac\uc6a9\ud558\uc5ec \uad00\uacc4\ub97c \uc815\ub7c9\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span> <\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-5773 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/quadregstata2.png\" sizes=\"auto, \" srcset=\"\" alt=\"2\ucc28 \uad00\uacc4\uc758 \uc608\" width=\"441\" height=\"319\"><\/p>\n<p> <span style=\"color: #000000;\">\uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 R\uc5d0\uc11c 2\ucc28 \ud68c\uadc0\ub97c \uc218\ud589\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4.<\/span><\/p>\n<h3> <strong>\uc608: R\uc758 2\ucc28 \ud68c\uadc0<\/strong><\/h3>\n<p> <span style=\"color: #000000;\">\uadfc\ubb34 \uc2dc\uac04\uacfc \ubcf4\uace0\ub41c \ud589\ubcf5 \uc0ac\uc774\uc758 \uad00\uacc4\ub97c \uc774\ud574\ud558\uace0 \uc2f6\ub2e4\uace0 \uac00\uc815\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc6b0\ub9ac\ub294 11\uba85\uc758 \uc11c\ub85c \ub2e4\ub978 \uc0ac\ub78c\ub4e4\uc5d0 \ub300\ud55c \uc8fc\ub2f9 \uadfc\ubb34 \uc2dc\uac04\uacfc \ubcf4\uace0\ub41c \ud589\ubcf5 \uc218\uc900(0~100\uc810)\uc5d0 \ub300\ud55c \ub2e4\uc74c\uacfc \uac19\uc740 \ub370\uc774\ud130\ub97c \uac00\uc9c0\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/span> <\/p>\n<p data-slot-rendered-dynamic=\"true\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-6954 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/quadti1.png\" sizes=\"auto, \" srcset=\"\" alt=\"\" width=\"150\" height=\"248\"><\/p>\n<p> <span style=\"color: #000000;\">R\uc5d0\uc11c 2\ucc28 \ud68c\uadc0 \ubaa8\ub378\uc744 \ub9de\ucd94\ub824\uba74 \ub2e4\uc74c \ub2e8\uacc4\ub97c \uc0ac\uc6a9\ud558\uc138\uc694.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1\ub2e8\uacc4: \ub370\uc774\ud130\ub97c \uc785\ub825\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">\uba3c\uc800 \ub370\uc774\ud130\uac00 \ud3ec\ud568\ub41c \ub370\uc774\ud130 \ud504\ub808\uc784\uc744 \ub9cc\ub4ed\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#createdata<\/span>\ndata &lt;- data.frame(hours=c(6, 9, 12, 14, 30, 35, 40, 47, 51, 55, 60),\n                   happiness=c(14, 28, 50, 70, 89, 94, 90, 75, 59, 44, 27))\n<span style=\"color: #008080;\">\n#viewdata<\/span> \ndata\n\n   hours happiness\n1 6 14\n2 9 28\n3 12 50\n4 14 70\n5 30 89\n6 35 94\n7 40 90\n8 47 75\n9 51 59\n10 55 44\n11 60 27\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>2\ub2e8\uacc4: \ub370\uc774\ud130\ub97c \uc2dc\uac01\ud654\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c\uc73c\ub85c, \ub370\uc774\ud130\ub97c \uc2dc\uac01\ud654\ud558\uae30 \uc704\ud574 \uac04\ub2e8\ud55c \uc0b0\uc810\ub3c4\ub97c \ub9cc\ub4e4\uc5b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/span> <\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create scatterplot<\/span>\nplot(data$hours, data$happiness, pch=16)<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-8616 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/quadratiquer1.png\" alt=\"R\uc758 \uc0b0\uc810\ub3c4\" width=\"370\" height=\"336\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">\ub370\uc774\ud130\uac00 \uc120\ud615 \ud328\ud134\uc744 \ub530\ub974\uc9c0 \uc54a\ub294\ub2e4\ub294 \uac83\uc744 \ubd84\uba85\ud788 \uc54c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>3\ub2e8\uacc4: \ub2e8\uc21c \uc120\ud615 \ud68c\uadc0 \ubaa8\ub378\uc744 \ud53c\ud305\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c\uc73c\ub85c \uac04\ub2e8\ud55c \uc120\ud615 \ud68c\uadc0 \ubaa8\ub378\uc744 \ud53c\ud305\ud558\uc5ec \ub370\uc774\ud130\uc5d0 \uc5bc\ub9c8\ub098 \uc798 \ub9de\ub294\uc9c0 \ud655\uc778\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#fit linear model<\/span>\nlinearModel &lt;- lm(happiness ~ hours, data=data)\n\n<span style=\"color: #008080;\">#view model summary<\/span>\nsummary(linearModel)\n\nCall:\nlm(formula = happiness ~ hours)\n\nResiduals:\n   Min 1Q Median 3Q Max \n-39.34 -21.99 -2.03 23.50 35.11 \n\nCoefficients:\n            Estimate Std. Error t value Pr(&gt;|t|)  \n(Intercept) 48.4531 17.3288 2.796 0.0208 *\nhours 0.2981 0.4599 0.648 0.5331  \n---\nSignificant. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n\nResidual standard error: 28.72 on 9 degrees of freedom\nMultiple R-squared: 0.0446, Adjusted R-squared: -0.06156 \nF-statistic: 0.4201 on 1 and 9 DF, p-value: 0.5331\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\ub2e4\uc911 R-\uc81c\uacf1 \uac12\uc73c\ub85c \ud45c\uc2dc\ub418\ub294 \uac83\ucc98\ub7fc \ubaa8\ub378\uc774 \uc124\uba85\ud558\ub294 \ud589\ubcf5\uc758 \ucd1d \ubd84\uc0b0\uc740 <strong>4.46%<\/strong> \uc5d0 \ubd88\uacfc\ud569\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>4\ub2e8\uacc4: 2\ucc28 \ud68c\uadc0 \ubaa8\ub378\uc744 \ud53c\ud305\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c\uc73c\ub85c 2\ucc28 \ud68c\uadc0 \ubaa8\ub378\uc744 \ud53c\ud305\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create a new variable for hours <sup>2<\/sup><\/span>\ndata$hours2 &lt;- data$hours^2\n\n<span style=\"color: #008080;\">#fit quadratic regression model<\/span>\nquadraticModel &lt;- lm(happiness ~ hours + hours2, data=data)\n\n<span style=\"color: #008080;\">#view model summary\n<\/span>summary(quadraticModel)\n\nCall:\nlm(formula = happiness ~ hours + hours2, data = data)\n\nResiduals:\n    Min 1Q Median 3Q Max \n-6.2484 -3.7429 -0.1812 1.1464 13.6678 \n\nCoefficients:\n             Estimate Std. Error t value Pr(&gt;|t|)    \n(Intercept) -18.25364 6.18507 -2.951 0.0184 *  \nhours 6.74436 0.48551 13.891 6.98e-07 ***\nhours2 -0.10120 0.00746 -13.565 8.38e-07 ***\n---\nSignificant. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1\n\nResidual standard error: 6.218 on 8 degrees of freedom\nMultiple R-squared: 0.9602, Adjusted R-squared: 0.9502 \nF-statistic: 96.49 on 2 and 8 DF, p-value: 2.51e-06\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\ubaa8\ub378\uc774 \uc124\uba85\ud558\ub294 \ud589\ubcf5\uc758 \ucd1d \ubd84\uc0b0\uc740 <b>96.02%<\/b> \ub85c \uc99d\uac00\ud588\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ub2e4\uc74c \ucf54\ub4dc\ub97c \uc0ac\uc6a9\ud558\uc5ec \ubaa8\ub378\uc774 \ub370\uc774\ud130\uc5d0 \uc5bc\ub9c8\ub098 \uc798 \ub9de\ub294\uc9c0 \uc2dc\uac01\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span> <\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create sequence of hour values<\/span>\nhourValues &lt;- seq(0, 60, 0.1)\n\n<span style=\"color: #008080;\">#create list of predicted happiness levels using quadratic model\n<\/span>happinessPredict &lt;- predict(quadraticModel, list(hours=hourValues, hours2=hourValues^2))\n\n<span style=\"color: #008080;\">#create scatterplot of original data values\n<\/span>plot(data$hours, data$happiness, pch=16)\n<span style=\"color: #008080;\">#add predicted lines based on quadratic regression model<\/span>\nlines(hourValues, happinessPredict, col='blue')\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-8619 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/quadratiquer2.png\" alt=\"R\uc758 2\ucc28 \ud68c\uadc0 \uc0b0\uc810\ub3c4\" width=\"399\" height=\"368\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">2\ucc28 \ud68c\uadc0\uc120\uc774 \ub370\uc774\ud130 \uac12\uacfc \uaf64 \uc798 \ub9de\ub294 \uac83\uc744 \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>5\ub2e8\uacc4: 2\ucc28 \ud68c\uadc0 \ubaa8\ub378\uc744 \ud574\uc11d\ud569\ub2c8\ub2e4.<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc774\uc804 \ub2e8\uacc4\uc5d0\uc11c 2\ucc28 \ud68c\uadc0 \ubaa8\ub378\uc758 \uacb0\uacfc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<pre style=\"background-color: #e5e5e5; font-size: 15px;\"> <strong>Coefficients:\n             Estimate Std. Error t value Pr(&gt;|t|)    \n(Intercept) -18.25364 6.18507 -2.951 0.0184 *  \nhours 6.74436 0.48551 13.891 6.98e-07 ***\nhours2 -0.10120 0.00746 -13.565 8.38e-07 ***\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">\uc5ec\uae30\uc5d0 \uc81c\uc2dc\ub41c \uacc4\uc218\ub97c \uae30\ubc18\uc73c\ub85c \uc870\uc815\ub41c 2\ucc28 \ud68c\uadc0\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>\ud589\ubcf5 = -0.1012(\uc2dc\uac04) <sup>2<\/sup> + 6.7444(\uc2dc\uac04) \u2013 18.2536<\/strong><\/span><\/p>\n<p> <span style=\"color: #000000;\">\uc6b0\ub9ac\ub294 \uc774 \ubc29\uc815\uc2dd\uc744 \uc0ac\uc6a9\ud558\uc5ec \uac1c\uc778\uc758 \uc8fc\ub2f9 \uadfc\ubb34 \uc2dc\uac04\uc744 \ubc14\ud0d5\uc73c\ub85c \uac1c\uc778\uc758 \uc608\uc0c1 \ud589\ubcf5\uc744 \ucc3e\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/span><\/p>\n<p data-slot-rendered-dynamic=\"true\"> <span style=\"color: #000000;\">\uc608\ub97c \ub4e4\uc5b4, \uc8fc\ub2f9 60\uc2dc\uac04 \uc77c\ud558\ub294 \uc0ac\ub78c\uc758 \ud589\ubcf5 \uc218\uc900\uc740 <strong>22.09<\/strong> \uc785\ub2c8\ub2e4.<\/span><\/p>\n<p data-slot-rendered-dynamic=\"true\"> <span style=\"color: #000000;\">\ud589\ubcf5 = -0.1012(60) <sup>2<\/sup> + 6.7444(60) \u2013 18.2536 = 22.09<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ubc18\ub300\ub85c \uc8fc\ub2f9 30\uc2dc\uac04 \uc77c\ud558\ub294 \uc0ac\ub78c\uc758 \ud589\ubcf5\uc9c0\uc218\ub294 <strong>92.99<\/strong> \uc774\ub2e4.<\/span><\/p>\n<p> <span style=\"color: #000000;\">\ud589\ubcf5 = -0.1012(30) <sup>2<\/sup> + 6.7444(30) \u2013 18.2536 = 92.99<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ub450 \ubcc0\uc218\uac00 \uc120\ud615 \uad00\uacc4\ub97c \uac16\ub294 \uacbd\uc6b0 \ub2e8\uc21c \uc120\ud615 \ud68c\uadc0\ub97c \uc0ac\uc6a9\ud558\uc5ec \uad00\uacc4\ub97c \uc815\ub7c9\ud654\ud560 \uc218 \uc788\ub294 \uacbd\uc6b0\uac00 \ub9ce\uc2b5\ub2c8\ub2e4. \uadf8\ub7ec\ub098 \ub450 \ubcc0\uc218\uac00 2\ucc28 \uad00\uacc4\ub97c \uac16\ub294 \uacbd\uc6b0 2\ucc28 \ud68c\uadc0\ub97c \uc0ac\uc6a9\ud558\uc5ec \uad00\uacc4\ub97c \uc815\ub7c9\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \ud29c\ud1a0\ub9ac\uc5bc\uc5d0\uc11c\ub294 R\uc5d0\uc11c 2\ucc28 \ud68c\uadc0\ub97c \uc218\ud589\ud558\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud569\ub2c8\ub2e4. \uc608: R\uc758 2\ucc28 \ud68c\uadc0 \uadfc\ubb34 \uc2dc\uac04\uacfc \ubcf4\uace0\ub41c \ud589\ubcf5 \uc0ac\uc774\uc758 \uad00\uacc4\ub97c \uc774\ud574\ud558\uace0 \uc2f6\ub2e4\uace0 \uac00\uc815\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc6b0\ub9ac\ub294 11\uba85\uc758 \uc11c\ub85c [&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-781","post","type-post","status-publish","format-standard","hentry","category-20"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - 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