For the employees who left the company before 3 years, what is an appropriate test of hypothesis to determine if the mean tenure of such employees equals 18 months in the population?

One sample t test Paired samples t test Independent samples t test None of the above

1 points

QUESTION 2

Perform an appropriate test of hypothesis in order to determine whether the average salary of a D&Y employee is $40,000. What is the observed value of the test statistic?

8.489

6.482

9.58

3.86

1 points

QUESTION 3

Test the hypothesis that in the population there is no difference in mean salary between employees who graduated from State University and those who did not. In absolute terms what is the observed value of the test statistic?

0.0030.9983.1399.313

1 points

QUESTION 4

Test the hypothesis that in the population there is no difference in mean salary between employees who graduated from State University and those who did not. In absolute terms what is the critical value of the test statistic?

4.0013.1398.4891.998

1 points

QUESTION 5

Test the hypothesis that in the population there is no difference in mean salary between employees who graduated from State University and those who did not. What is your conclusion about the null hypothesis?

Fail to reject the null hypothesis Reject the null hypothesis Both A and B Neither A nor B

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