Chapter 14.7, Problem 42E

A regression model relating x, number of salespersons at a branch office, to y, annual sales at the office (in thousands of dollars) provided the following computer output from a regression analysis of the data.

Analysis of Variance

Regression Equation Y = 80.0 + 50.00 X

1. a. Write the estimated regression equation.
2. b. How many branch offices were involved in the study?
3. c. Compute the F statistic and test the significance of the relationship at a .05 level of significance.
4. d. Predict the annual sales at the Memphis branch office. This branch employs 12 salespersons.