cor(test2[,c("아이큐",
"공부시간", "등급평균")])
> cor(test2[,c("아이큐", "공부시간", "등급평균")])
아이큐
공부시간 등급평균
아이큐 1.0000000 0.7710712 0.9736894
공부시간 0.7710712
1.0000000 0.7300546
등급평균 0.9736894
0.7300546 1.0000000
test2<-test2[,-1]
m2<-lm(test2$시험점수~.,data=test2)
summary(m2)
vif(m2)
> test2<-test2[,-1]
> m2<-lm(test2$시험점수~.,data=test2)
> summary(m2)
Call:
lm(formula = test2$시험점수
~ ., data = test2)
Residuals:
Min 1Q
Median 3Q Max
-6.3146 -1.2184 -0.4266 1.5516 5.6358
Coefficients:
Estimate Std. Error t value
Pr(>|t|)
(Intercept) 50.30669 35.70317 1.409
0.2085
아이큐 0.05875 0.55872
0.105 0.9197
공부시간 0.48876
0.17719 2.758 0.0329 *
등급평균 7.37578
8.63161 0.855 0.4256
---
Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01
‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
Residual standard error: 3.952 on 6 degrees of
freedom
Multiple
R-squared: 0.9155, Adjusted
R-squared: 0.8733
F-statistic: 21.68 on 3 and 6 DF, p-value: 0.001275
> vif(m2)
아이큐 공부시간 등급평균
22.643553 2.517786 19.658264