The Dean of a Business School Claims That the Average

Multiple Choice

The dean of a business school claims that the average starting salary of its graduates is more than $50,000. It is known that the population standard deviation is $10,000. Sample data on the starting salaries of 36 randomly selected recent graduates yielded a mean of $62,000. What is the value of the sample test statistic?

A) z = 7.2
B) t = 5.04
C) z = 2.7
D) z = 5.6