NO.PZ202208300200000102
问题如下：
The results reported in Exhibit 1 are most accurately interpreted as indicating that:选项：
A.the reported R2 is spurious. B.multicollinearity is not present. C.the regression coefficients have inflated standard errors.解释：
SolutionB is correct. The pairwise correlation is low. The only case in which correlation between independent variables may be a reasonable indicator of multicollinearity occurs in a regression with exactly two independent variables, as is the case in this problem. Furthermore, the additional classic symptoms of multicollinearity (high R2 and significant F-statistic but not significant coefficients) are not present.
A is incorrect. Even in the face of multicollinearity, a regression may have a high R2.
C is incorrect. At least one coefficient (b2) is different from zero.
麻烦老师解释一下C是什么意思，没明白为啥要算test statistical 呀？
