A second analyst looked at the same data as in Exercise 25 and concluded that the use of the SRM for prediction was fine, on average, because the fitted line clearly tracks the mean of  as the value...

A second analyst looked at the same data as in Exercise 25 and concluded that the use of the SRM for prediction was fine, on average, because the fitted line clearly tracks the mean of
 as the value of
 increases. What do you think of this analysis?

Exercise 25

A hasty analyst looked at the normal quantile plot for the residuals from the regression shown and concluded that the model could not be used because the residuals were not normally distributed. What do you think of this analysis of the problem?