SOLUTION: a random sample of 8 us counties yielded the following numbers of cigarettes smoked annually per capita: 2206, 2391, 2540, 2116, 2010, 2791, 2392,2692. assume the data is normally
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-> SOLUTION: a random sample of 8 us counties yielded the following numbers of cigarettes smoked annually per capita: 2206, 2391, 2540, 2116, 2010, 2791, 2392,2692. assume the data is normally
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Question 1077503: a random sample of 8 us counties yielded the following numbers of cigarettes smoked annually per capita: 2206, 2391, 2540, 2116, 2010, 2791, 2392,2692. assume the data is normally distributed
construct a 95% confidence interval for the population mean per capita number of cigarettes smoked in all us counties Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! One calculates the mean of these 8 (2392.25)
use the sd of the sample (274.59)
the t-value for 7 df and 0.975 (2.365)
t*s/sqrt(8)= interval width, which is added and subtracted from mean (229.60)
(2162.65, 2621.85)
