<PRE><B>Question 449796</B>
A sociologist expects the life expectancy of people in Africa is different than the life expectancy of people in Asia. The data obtained is shown in the table below. Determine the 95% confidence interval for the difference in the population means.

Africa: X bar 1 = 55.3 yr.
Sigma 1 = 8.1 yr.
N1 = 53
Asia: X bar 2 = 65.2 yr.
Sigma 2 = 9.3 yr.
N2 = 42
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I ran a 2SampleTInterval program on my TI-84 and got the
following 95% confidence interval: (6.2876,13.512)
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Cheers,
stan H.</PRE>