题目
Which of the following situations is not possible from the result of a multiple regression analysis with more than 50 observations?
「huixue_img/importSubject/1564169387970269184.png」
选项
A.71%； 69%
B.83%； 86%
C.54%； 12%
D.10%； -2%
答案
B
解析
Adjusted R2 must be less than or equal to R2. However, if R2 is low enough and the number of independent variables is large, adjusted R2 may be negative.调整后的R2必须小于或等于R2。 但是，如果R2足够低并且自变量的数量很大，则调整后的R2可能为负。