The Dean of a Business School Claims That the Average

question 111

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 20 randomly selected recent graduates yielded a mean of $55,000. What is the value of the sample test statistic?

• A) z = 2.24
• B) t = 7.2
• C) t = 5.04
• D) t = 2.24

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Definitions:

Ascertainable Value

A value that can be precisely determined or measured.

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