The Following Results Were Obtained from a Multiple Regression Analysis

Essay

The following results were obtained from a multiple regression analysis of supermarket profitability.The dependent variable,Y,is the profit (in thousands of dollars)and the independent variables,X₁ and X₂,are the food sales and nonfood sales (also in thousands of dollars).


a.Write the estimated regression equation for the relationship between the variables.
b.Compute the coefficient of determination and fully interpret its meaning.
c.Carry out a test of whether Y is significantly related to the independent variables.Use a 0.05 level of significance.
d.Carry out a test to determine if there is a significant relationship between X₁ and Y.Use a .05 level of significance.
e.How many supermarkets were in the sample used here?