Q14. A utility analyst performed a regression analysis relation monthly energy consumption to average monthly temperature over the last four years. Total variation of the dependent variable was 58.6 and the unexplained variation was 313. The coefficient of determination and standards error of estimate, respectively, for the regression model are closest to :

Coefficient of determination      Standards error of estimate

A.        0.4659                       0.8075

B.        0.4659                       0.8249

C.        0.5341                       0.8075

D.        0.5341                       0.8249

答案和详解如下：

Q14.    B            Study Session 3-12.f

The coefficient of determination is explained variation divided by total variation:

(58.6-31.3)/58:6=0.4659

There are a total of 48 observations in the sample; the standards error of estimate is:

{31.3/46}1/2=0.8249

?

总差异量变化量是58.6， 不可解释的变化量是313。

最接近回归模型分析法的需求系数和标准误差值分别是多少？