Study Time and Score. Use the data on total hours studied over 2 weeks and test score at the end of the 2 weeks from Exercise 15.27.

Working with Large Data Sets In Exercises 15.34–15.43, use the technology of your choice to

a. obtain and interpret the standard error of the estimate.

b. obtain a residual plot and a normal probability plot of the residuals.

c. decide whether you can reasonably consider Assumptions 1–3 for regression inferences met by the two variables under consideration.