Question: Consider the regression model for the heat treating data in Exercise 12-10. (a) Calculate the percent of variability explained by this model. (b) Construct a

Consider the regression model for the heat treating data in Exercise 12-10.
(a) Calculate the percent of variability explained by this model.
(b) Construct a normal probability plot for the residuals.
Comment on the normality assumption.
(c) Plot the residuals versus and interpret the display.
(d) Calculate Cook’s distance for each observation and provide an interpretation of this statistic.

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