1. Based on sample data, the 95% confidence interval for the slope of the population regression line is found to be from 4.2 to 6.7. Based on this information, what is the most accurate statement that can be made about the p-value in testing H0: /31 5 0 versus H1: /31 * 0? Explain.
2. For the regression line developed in Exercise 15.37,
a. Use the 0.05 level in testing whether the population coefficient of correlation could be zero.
b. Use the 0.05 level in testing whether the population regression equation could have a slope of zero.
c. Construct the 95% confidence interval for the slope of the population regression equation.
3. 
For the regression line developed in Exercise 15.38,
a. Use the 0.05 level in testing whether the population coefficient of correlation could be zero.
b. Use the 0.05 level in testing whether the population regression equation could have a slope of zero.
c. Construct the 95% confidence interval for the slope of the population regression equation.
4. A computer analysis of 30 pairs of observations results in the least-squares regression equation yˆ 5 14.0 1 5.0x, and the standard deviation of the slope used in testing whether the population coefficient of correlation could be zero?
c. Construct the 95% confidence interval for the population slope, /31.