In Problem 14.4 on page 583, you used sales and number of orders to predict distribution costs

Question:

In Problem 14.4 on page 583, you used sales and number of orders to predict costs at a mail-order catalog business (stored in WareCost). Use the results from that problem.
a. Construct a 95% confidence interval estimate of the population slope between cost and sales.
b. At the 0.05 level of significance, determine whether each independent variable makes a significant contribution to the regression model. On the basis of these results, indicate the independent variables to include in this model.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...