Do women and men differ in how they perceive their life expectancy? A researcher asked a sample of men and women to indicate their life expectancy. This was compared with values from actuarial tables, and the relative percent difference was computed (perceived life expectancy minus life expectancy from actuarial tables was divided by life expectancy from actuarial tables and converted to a percent). Below are thex_iands_ifor the two samples.

Null hypothesis:Difference of means = 0Alternative hypothesis:Difference of means is not 0

SexStd DevSample MeannM6.60319.78

6F5.53112.950

7

Starting from these values, find thettest statistic and its degrees of freedom. (Round your answers to three decimal places.)