Question: Consider the simple linear regression model fi t to the oxygen purity data in Problem 2.7. a. Construct a normal probability plot of the residuals.

Consider the simple linear regression model fi t to the oxygen purity data in Problem 2.7.

a. Construct a normal probability plot of the residuals. Does there seem to be any problem with the normality assumption?

b. Construct and interpret a plot of the residuals versus the predicted response.

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