Question

A researcher wants to test if the mean annual salary of all lawyers in a city is different from $110,000. A random sample of 51 lawyers selected from the city reveals a mean annual salary of $105000. Assume that σ=$20000, and that the test is to be made at the 2% significance level.

What are the critical values of *z*?

-1.645 and 1.645 |

-1.28 and 1.28 |

-2.33 and 2.33 |

-2.05 and 2.05 |

What is the value of the test statistic, *z*, rounded to
three decimal places?

Enter you answer; What is the value of the test statistic,
z?

What is the *p*-value for this hypothesis test, rounded
to four decimal places?

Enter you answer; What is the p-value for this hypothesis
test?

Should you reject or fail to reject the null hypothesis in this test?

Choose your answer; Should you reject or fail to reject the null hypothesis in this test?

Reject.Fail to reject.

Answer #1

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Suppose that US news publishes an article saying the average
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(1 POINT)
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The average annual salary of employees at Wintertime
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