The Following Results Were Obtained from a Multiple Regression Analysis

question 109

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). Coefficient of determination = 0.7139
a.Write the estimated regression equation for the relationship between the variables.
b.What can you say about the strength of this relationship?
c.Carry out a test of whether y is significantly related to the independent variables. Use a .01 level of significance.
d.Carry out a test of whether x₁ and y are significantly related. Use a .05 level of significance.
e.How many supermarkets are in the sample used here?

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Definitions:

English-only rules

Policies set by employers that require employees to speak only English at the workplace during work hours, implemented for reasons such as safety, efficiency, or customer service.

Workplace discrimination

Discriminatory practices within a work environment that unfairly disadvantage individuals based on their race, gender, age, disability, sexual orientation, or other characteristics.

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