A national business magazine reports that the mean age of retirement for women executives is 64.464.4. A women's rights organization believes that this value does not accurately depict the current trend in retirement. To test this, the group polled a simple random sample of 7979 recently retired women executives and found that they had a mean age of retirement of 64.964.9. Assuming the population standard deviation is 2.12.1 years, is there sufficient evidence to support the organization's belief at the 0.010.01 level of significance?

Step2of3:

Compute the value of the test statistic. Round your answer to two decimal places.