For the regression analysis of the data in Exercise 15 81 a
For the regression analysis of the data in Exercise 15.81:
a. Use the 0.10 level in testing whether the population coefficient of correlation could be zero.
b. Use the 0.10 level in testing whether the population regression equation could have a slope of zero.
c. Construct the 90% confidence interval for the slope of the population regression equation. Discuss the interval in terms of the results of part (b).
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