(Solved): A company attempts to evaluate the potential for a new bonus plan by selecting a sample of four sal ...

A company attempts to evaluate the potential for a new bonus plan by selecting a sample of four salespersons to use the bonus plan for a trial period. The weekly sales volume before and after implementing the bonus plan is shown below. (For the following matched samples, let $d=$ After - Before.) a. State the hypotheses. b. Compute the test statistic. c. Use $\alpha =0.05$ and test to see if the bonus plan will result in an increase in the mean weekly sales.