In order to determine whether or not the number of automobiles sold per day (y) is related to price (x₁ in $1,000), and the number of advertising spots (x₂), data were gathered for 7 days. Part of the Excel output is shown below. a.Determine the least squares regression function relating y to x₁ and x₂. b.If the company charges $20,000 for each car and uses 10 advertising spots, how many cars would you expect them to sell in a day? c.At $\alpha$ = 0.05, test to determine if the fitted equation developed in Part a represents a significant relationship between the independent variables and the dependent variable. d.At $\alpha$ = 0.05, test to see if $\beta$₁ is significantly different from zero. e.Determine the multiple coefficient of determination.

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The Answer of In order to determine whether or not the number of automobiles sold per day (y) is related to price (x₁ in $1,000), and the number of advertising spots (x₂), data were gathered for 7 days. Part of the Excel output is shown below. a.Determine the least squares regression function relating y to x₁ and x₂. b.If the company charges $20,000 for each car and uses 10 advertising spots, how many cars would you expect them to sell in a day? c.At $\alpha$ = 0.05, test to determine if the fitted equation developed in Part a represents a significant relationship between the independent variables and the dependent variable. d.At $\alpha$ = 0.05, test to see if $\beta$₁ is significantly different from zero. e.Determine the multiple coefficient of determination.

In Order to Determine Whether or Not the Number of Automobiles