Homework Answers
Solution:- Given that sd = 8500, E = 2700, 96% confidence interval for Z = 2.05
=> n = (Z*S/E)^2
= (2.05*8500/2700)^2
= 41.650
n = 42
The sample size needed is 42
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confidence interval with a margin of error equal to 3,100 miles.
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