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).
a. Plot the residuals versus t
b. Plot the residuals versus X1y.
c. Plot the residuals versus X2t.
d. Plot the residuals versus time.
e. In the residual plots created in (a) through (d), is there any evidence of a violation of the regression assumptions? Explain.
f. Determine the Durbin-Watson statistic.
g. At the 0.05 level of significance, is there evidence of positive autocorrelation in the residuals? 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...