The manager of a sporting goods store offered a bonus commission to his salespeople when they sold more goods. A new manager decided to drop the bonus system. For a random sample of six employees, the weekly sales (in dollars) are shown in the following table for each employee with and without the bonus system. Does this imply that sales dropped when the bonus system was discontinued? Salesperson D E With bonus 2900 3000 5800 4400 5300 560 wout bonus 2800 2500 5900 3500 4600 4600