Question: Refer to Exercise 11-8, which presented data on blood pressure rise y and sound pressure level x. (a) What proportion of total variability in blood

Refer to Exercise 11-8, which presented data on blood pressure rise y and sound pressure level x.

(a) What proportion of total variability in blood pressure rise is accounted for by sound pressure level?

(b) Prepare a normal probability plot of the residuals from this least squares model. Interpret this plot.

(c) Plot residuals versus and versus x. Comment on these plots.

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