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In: Statistics and Probability

Do women and men differ in how they perceive their life expectancy? A researcher asked a...

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 the xi and si for the two samples.

Null hypothesis:     Difference of means = 0
Alternative hypothesis:     Difference of means is not 0
Sex Std Dev Sample Mean n
M 6.674

−19.63

 6
F 5.503

−12.940

 7

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

t

=
df =

Solutions

Expert Solution

t= −1.983

df=11

orchestra answered 2 years ago
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