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Question
In order to determine whether or not the sales volume of a company (yin millions of dollars) is related to advertising expenditures (x1in millions of dollars) and the number of salespeople (x2), data were gathered for 10 years. Part of the Excel output is shown below.| ANOVA | ||||
| df | SS | MS | F | |
| Regression | 321.11 | |||
| Residual | 63.39 | |||
| Coefficients | Standard Error | |||
| Intercept | 7.0174 | 1.8972 | ||
| x1 | 8.6233 | 2.3968 | ||
| x2 | 0.0858 | 0.1845 |
a. Use the above results and write the regression equation that can be used to predict sales.
b. Estimate the sales volume for an advertising expenditure of 3.5 million dollars and 45 salespeople. Give your answer in dollars.
c. At
= 0.01, 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
= 0.05, test to see if 
1is significantly different from zero.e. Determine the multiple coefficient of determination.
f. Compute the adjusted coefficient of determination.
Answer
This answer is hidden. It contains 135 characters.
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