NO.PZ2024120401000063
问题如下：
Pretend GARP regressed the exam scores (FRMScore) against preparation time (Hours) and returned the following regression:
FRMScore(i) = 23.2 + 0.18*Hours(i) + u(i).
Which of the following is the best interpretation of the error term, u(i)?
选项：
A.
It allows for users to adjust to inform the intercept with a "real world" interpretation
B.
It contains the assumed but unobserved correlation between the error term and the regressor (independent variable)
C.
The error term represents all of the factors other than preparation time that influence the score
D.
It is the estimator of the standard deviation of the regression error
解释：
The error term incorporates all of the factors responsible for the difference between the ith candidate's test score and the value predicted by the regression model. This error term contains all the other factors besides X that determine the value of the dependent variable, Y, for a specific observation, i.
请问为什么a不对？不是y与y hat之间的取值吗
