Test for single population mean.
Utilize a 0.05 significance level to test the claim that the mean life span of cell phones is equal to 5 years. The sample data are summarized by the statistics n=27, x=4.6 years, s 1.9 years. See the display below.


Test

Value = 5









95% Confidence Interval of the Difference


t

df

Sig. 2(Tailed)

Mean Difference

lower

upper

Age

1.094

26

0.284

0.4

************

*****
