# The times required to check out customers in a supermarket and the corresponding values of purchases are shown in Table P-4. Answer parts a, b, e, and f of Problem 3 using these data. Give a point forecast and a

The times required to check out customers in a supermarket and the corresponding values of purchases are shown in Table P-4. Answer parts a, b, e, and f of Problem 3 using these data. Give a point forecast and a 99% interval forecast for Y if X = 3.0.

In Problem 3

a. Does a significant relationship exist between advertising expenditures and sales?

b. State the prediction equation.

e. State the amount of unexplained variation.

f. State the amount of total variation.

**Transcribed Image Text:**

## TABLE P-4 Time Required Value of Time Required Value of for Checkout Purchase for Checkout Purchase (minutes) 30.6 30.5 2.4 42.2 21.8 (minutes) 1.8 4.3 2.6 1.3 3.6 4.1 40.1 2.0 15.5 6.5 5.7

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## Correlation of Time and Value 0967 The regression equation is Time 0620 0109 …View the full answer

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