Life expectancy in the US varies depending on where an individual lives, reflecting social and health...

	Mean life expectancy at birth for males in 2014	Sample standard deviation	Sample size (n)
San Mateo County	81.13 years	8.25	101
SF County	79.34 years	9.47	105

1. Calculate the standard error of the mean difference in male life expectancy between the 2 counties, assuming nonequal variance.

2. Calculate a 99% confidence interval for the mean difference in male life expectancy between the two counties. Use the conservative approximation for degrees of freedom.

3.Based on your confidence interval, would you expect the mean difference in male life expectancy to be statistically significant at the α=.01 level? EXPLAIN

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Expert Solution

milcah answered 9 months ago

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