NO.PZ2021071601000008
问题如下:
John, an analyst ran a
simple regression explaining the variation in electricity consumption as a
function of temperature. The total variation of the dependent variable
was 132.08, and the explained variation was 60.38. She had 60 monthly
observations.
Calculate the coefficient of determination.
选项:
A.0.4571 B.2.19 C.0.21解释:
The coefficient of determination is 0.4571:
样本方差的分母应为59,总体方差的分母是60,故最后SSR/SST是否应为60.38/132.08再乘以59/60。