2. A study on the factor that determine sales (y in millions of dollars) for a big grocery store chain. The factors considered are advertising expenditures (x) in thousands of dollars), and number of...

Extracted text: 2. A study on the factor that determine sales (y in millions of dollars) for a big grocery store chain. The factors considered are advertising expenditures (x) in thousands of dollars), and number of salespeople (x2). The following is part of the results: ANOVA Source Regression df SS MS 2 2956.064 Error 15 736.012 a. What has been the sample size for this regression analysis? b. At a = 05, test to determine if the model is significant. That is, determine if there exists a significant relationship between the independent variables and the dependent variable. c. Determine the multiple coefficient of determination R². d. Determine the adjusted multiple coefficient of determination (adjusted R?).