Question: In Problem 14.4 on page 583, you used sales and number of orders to predict distribution costs at a mail-order catalog business (stored in WareCost).

In Problem 14.4 on page 583, you used sales and number of orders to predict distribution costs at a mail-order catalog business (stored in WareCost). Use the results from that problem.
a. Determine whether there is a significant relationship between distribution costs and the two independent variables (sales and number of orders) at the 0.05 level of significance.
b. Interpret the meaning of the p-value.
c. Compute the coefficient of multiple determination, r2, and interpret its meaning.
d. Compute the adjusted r2.

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