Chapter 14, Problem 4PS

a.

To determine

Determine the multiple regression equation.

b.

To determine

Interpret the meaning of slopes $b_1\text{ and }{b}_2$ .

c.

To determine

Explain that regression coefficient has no practical meaning in the context of problem.

d.

To determine

Predict the mean monthly warehouse distribution cost when sales are $\$400,000$ and the number of orders is $4,500$ .

e.

To determine

Determine the 95% confidence interval for mean monthly warehouse distribution cost when sales are $\$400,000$ and number of orders are $4,500$ .

f.

To determine

Determine the $95\%$ prediction interval for monthly warehouse distribution cost for a particular month when sales are $\$400,000$ and number of orders are $4,500$ .

g.

To determine

Explain why the interval of part (e) is narrower than the interval of part (f).

h.

To determine

Determine the conclusion about the warehouse distribution cost.