Residuals vs Fitted Normal Q-Q 10 0 0 .2 2 Fitted values Theoretical Quantiles From the two plots above we can see that the scale of the variability of the errors is not constant at all values of the explanatory variables. What about the plots tells us this? (1 mark) The mean of the residuals in the Fitted vs Residuals plot is zerO The mean of the standardized residuals in the Normal Q-Q plot is zero The tails of the Q-Q plot diverge from the normal line The spread of the residuals varies across the fitted values 3.pdf