For Exercises 72–74, use technology to solve the following problems:

  1. Verify the regression model assumptions.
  2. Construct and interpret a 95% confidence interval for .
  3. Based on the confidence interval constructed in (b), would you expect the hypothesis test to reject the null hypothesis that ?
  4. Test, at , whether a linear relationship exists between and .

Question 13.72

darts

72. Open the Darts data set, which we used for the Chapter 3 Case Study. Use the Dow Jones Industrial Average to estimate the pros' performance .