NO.PZ202306130100003306
问题如下：
Based on Exhibit 2, the number of degrees of freedom for the t-test of the slope
coefficient in this regression is:
选项：
A.48
B.49
C.50
解释：
A is correct. The degrees of freedom are the number of observations minus the
number of parameters estimated, which equals 2 in this case (the intercept and
the slope coefficient). The number of degrees of freedom is 50 − 2 = 48.
您好，这题虽然选对了，但是不太明白题目和怎么理解，麻烦了，谢谢
