Question: Refer to Exercise 11-10, which presented data on chloride concentration y and roadway area x. (a) What proportion of the total variability in chloride concentration

Refer to Exercise 11-10, which presented data on chloride concentration y and roadway area x.

(a) What proportion of the total variability in chloride concentration is accounted for by the regression model?

(b) Plot the residuals versus and versus x. Interpret these plots.

(c) Prepare a normal probability plot of the residuals. Does the normality assumption appear to be satisfied?

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