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 53 lawyers selected from the city reveals a mean annual salary of $ 116000. Assume that sigma =$17900, and that the test is to be made at the 1% significance level.
What are the critical values of z ?
-2.58 and 2.58
-2.05 and 2.05
-2.33 and 2.33
-1.96 and 1.96
What is the value of the test statistic, z, rounded to three decimal places?
What is the p-value for this hypothesis test, rounded to four decimal places?
Should you reject or fail to reject the null hypothesis in this test?
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 53 lawyers selected from the city reveals a mean annual salary of $ 116000. Assume that o =$ 17900, and that the test is to be made at the 1%significance level.
What are the critical values of z?
O -2.58 and 2.58
O -2.05 and 2.05
O-2.33and 2.33
O-1.96 and 1.96
What is the value of the test statistic, z,rounded to three decimal places?
What is the p-value for this hypothesis test, rounded to four decimal places?
IF
Should you reject or fail to reject the null hypothesis in this test?