NO.PZ2019040801000032
问题如下：
What would the expectation of the dependent variable be equal to if the independent variable equals to zero?
选项：
A.
error term.
B.
intercept coefficient.
C.
unknown.
D.
slope term.
解释：
B is correct.
考点：Basic Statistics and Linear Regression
解析：Y=a+b*X+ ε 。当X=0时，E(Y) = a+0 = a，其中根据线性回归的假设， ε的数学期望为0
为什么不是A呢？谢老师
