You used sales and number of orders to predict distribution costs at a mail-order catalog business (stored

Question:

You used sales and number of orders to predict costs at a mail-order catalog business (stored in Ware Cost). Using 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.
For Information: Problem 14.4 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...