Question: Consider the data in Table P-3, where X = weekly advertising expenditures and Y = weekly sales. a. Does a significant relationship exist between advertising

Consider the data in Table P-3, where X = weekly advertising expenditures and Y = weekly sales.

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

b. State the prediction equation.

c. Forecast sales for an advertising expenditure of $50.

d. What percentage of the variation in sales can be explained with the prediction equation?

e. State the amount of unexplained variation.

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