Question 422763
a 95% confidence interval for the mean of a population is given as (3.0, 5.0). If a sample size of 100 was used to obtain this interval what was the standard deviation used in the calculation?
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2*ME = 5-3 = 2
ME = 1
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So zs/sqrt(n) = 1
1.96s/sqrt(100) = 0.196s = 1
s = 5.1020
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Cheers,
Stan H.