I think it is C

Question 4 [4]: A straight line was fit by least squares to 50 pairs of points using the standard model y = Bo + Bix +e in which var(e) = 02 is independent of a. Suppose that all the usual assumptions are met. The following were part of the regression output: . the sample variance was 50 1 V = SYY = 49 49 [(yi - 7)2 = 100 j=1 . the estimate, $2, of the error variance was 50 $2 = 48 (yi - y)2 = 10. 1=1 V and S' are so very different because (choose one) (a) V was calculated incorrectly; (b) $2 was calculated incorrectly; (c) V is not an estimator of o2; (d) V = 100 implies that there is a great deal of statistical variation, so the discrepancy is to be expected. Give a detailed motivation for your choice