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--- r:analysis_of_covariance [2016/11/23 09:47] – created hkimscil
+++ r:analysis_of_covariance [2019/09/18 07:58] (current) – [Ex. 1] hkimscil
@@ Line 53: / Line 53: @@
 </code>
-<code>> anova(lm.model4, lm.model3)
+<code>> anova(lm.model3, lm.model4)
 Analysis of Variance Table
-Model 1: Cars93$MPG.city ~ Cars93$EngineSize + Cars93$Price + Cars93$DriveTrain
+Model 1: Cars93$MPG.city ~ Cars93$EngineSize + Cars93$Price
-Model 2: Cars93$MPG.city ~ Cars93$EngineSize + Cars93$Price
+Model 2: Cars93$MPG.city ~ Cars93$EngineSize + Cars93$Price + Cars93$DriveTrain
   Res.Df    RSS Df Sum of Sq      F  Pr(>F)
-     88 1235.5
+     90 1309.7
-     90 1309.7 -2   -74.185 2.6419 0.07687 .
+     88 1235.5  2    74.185 2.6419 0.07687 .
 ---
 Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
-></code>
+>
+</code>
+====== Ex. 1 ======
+<WRAP round info 60%>
+mtcars 데이터를 이용하여 milleage에 영향을 주는 요소로 hp(horsepower)와 wt(weight)로 하여 regression을 하시오.
+또한 이에 더하여 cyl 숫자를 더하여 regression을 하시오. 그리고 그 차이점에 대해서 논하시오.
+</WRAP>
+{{tag> statistics r "analysis of covaraince" ancova}}