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Chapter 9 Questions and Answers
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Chapter 9 Questions and Answers If an economist wishes to determine whether there is evidence that mean family income in a community exceeds $50,000 - either a one-tail or two-tail test could be used with equivalent results. - a one-tail test should be utilized. - a two-tail test should be util...

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  • December 10, 2024
  • 3
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • chapter 9 questions and answers
  • if an economist wishes to determine whether there
  • if an economist wishes to determine whether there

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Chapter 9 Questions and Answers
If an economist wishes to determine whether there is evidence that mean family income
in a community exceeds $50,000
- either a one-tail or two-tail test could be used with equivalent results.
- a one-tail test should be utilized.
- a two-tail test should be utilized.
- None of these. - answer - A one-tail test should be utilized.

If an economist wishes to determine whether there is evidence that mean family income
in a community equals $50,000
- either a one-tail or two-tail test could be used with equivalent results.
- a one-tail test should be utilized.
- a two-tail test should be utilized.
- None of these - answer - A two-tail test should be utilized.

If the p-value is less than alpha in a two-tail test,
- the null hypothesis should not be rejected.
- the null hypothesis should be rejected.
- a one-tail test should be used.
- no conclusion should be reached. - answer - The null hypothesis should be rejected

A ________ is a numerical quantity computed from the data of a sample and is used in
reaching a decision on whether or not to reject the null hypothesis.
- significance level
- critical value
- test statistic
- parameter - answer - Test statistic

The owner of a local nightclub has recently surveyed a random sample of n = 250
customers of the club. She would now like to determine whether or not the mean age of
her customers is greater than 30. If so, she plans to alter the entertainment to appeal to
an older crowd. If not, no entertainment changes will be made. The appropriate
hypotheses to test are:
- H0: 30 versus H1: < 30.
- H0: 30 versus H1: > 30.
- H0: X 30 versus H1: X < 30.
- H0: X 30 versus H1: X > 30. - answer - H0: 30 versus H1: > 30.

The owner of a local nightclub has recently surveyed a random sample of n = 250
customers of the club. She would now like to determine whether or not the mean age of
her customers is greater than 30. If so, she plans to alter the entertainment to appeal to
an older crowd. If not, no entertainment changes will be made. If she wants to have a
level of significance at 0.01, what rejection region should she use?

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