SOLUTION: A sample of 23 European countries found that the variance on life expectancy was 7.3 years. What is the 95% confidence interval for the variance of life expectancy in Europe?
Algebra ->
Probability-and-statistics
-> SOLUTION: A sample of 23 European countries found that the variance on life expectancy was 7.3 years. What is the 95% confidence interval for the variance of life expectancy in Europe?
Log On
Question 1040404: A sample of 23 European countries found that the variance on life expectancy was 7.3 years. What is the 95% confidence interval for the variance of life expectancy in Europe? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! variance is 7.3 years^2
sd=sqrt of variance or 2.7 years
95% CI is t (0.975 df=22)*2.7/sqrt(23)
t is 2.074*2.7/sqrt(23)
That interval is +/- 1.17 years
