Management proposed the following regression model to predict sales at a fast-food outlet. y = Bo + Biz + B2e + Bzs +e where 21 = number of competitors within one mile 22 = population within one mile (1000s) Si if drive-up window present 10 otherwise y= sales ($1000s) The following estimated regression equation was developed after 20 outlets were surveyed. ý = 10.1 - 4.2z + 6.8z2 + 15.3z a. What is the expected amount of sales attributable to the drive-up window? b. Predict sales for a store with two competitors, a population of 8,000 within one mile, and no drive-up window. Estimate of sales = $ c. Predict sales for a store with one competitor, a population of 3,000 within 1 mile, and a drive-up window. Estimate of sales =$

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