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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
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 $5,920. He takes a random sample of 49 of the new salesperson's sales and finds an average markup of $5,320 and a standard deviation of $840. Assume the markups are normally distributed. What is the value of an appropriate test statistic for the car dealer to use to test his claim?
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z = 0.75
t48 = 0.75
t48 = 5.00
z = 5.00
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