A car dealer who sells only late-model luxury cars recently hired a new salesperson and believes that this salesperson is selling at lower markups. He knows that the long-run average markup in his lot is $5, 600. He takes a random sample of 16 of the new salesperson '5 sales and finds an average markup of$5,000 and a standard deviation of $800. Assume the markups are normally distributed, and use a 2% significance level. @1 Exam 3.21 A car dealer who sells only late-model luxury cars recently hired a new salesperson and believes that this salesperson is selling at lower markups. He knows that the long-run average markup in his lot is $5,600. He takes a random sample of 16 of the new salesperson's sales and nds an average markup of $5,000 and a standard deviation of $800. Assume the markups are normally distributed, and use a 2% signicance level. which of the following correctly represents the hypotheses for the car dealer? Ho: ,u = $5,600 Ha: ,u at $5,600 (3) H0: p. 2 $5,000 Ha: u $5,600 (6')