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Assume that you want to construct a 95% confidence interval estimate of population mean. Find an estimate of the minimum sample size needed to obtain the specified margin of error for the 95% confidence interval.
A) Margin of Error, E=2.6 minutes; sample standard deviation, = 45.4 minutes.
B) Margin of error, =0.025; sample proportion, hat(p) = 0.65.

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