The Distribution of the Annual Incomes of a Group of Middle

question 84

Multiple Choice

The distribution of the annual incomes of a group of middle management employees approximated a normal distribution with a mean of $37,200 and a standard deviation of $800. About 68 percent of the incomes lie between what two incomes?

• A) $30,000 and $40,000
• B) $36,400 and $38,000
• C) $34,800 and $39,600
• D) $35,600 and $38,800
• E) None of the choices are correct

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Definitions:

Power of the Test

The probability of correctly rejecting a false null hypothesis in a statistical test.

Test Statistic

A value calculated from sample data during a hypothesis test, used to decide whether to reject the null hypothesis.

PHStat

An Excel add-in that enhances the statistical functions of the software, enabling more complex analyses tailored to business and statistics courses.

Sample of Employees

A subset of employees selected from a larger population for the purpose of examining or collecting data regarding the whole group.