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May 22, 2015

Homework Help: Statistics

Posted by Tom on Saturday, March 13, 2010 at 9:26pm.

Calculate the following:
a) Determine the sample size necessary to estimate a population mean to within 1 with a 90% confidence given that the population standard deviation is 10.
b) Suppose that the sample was calculated at 150. Estimate the population mean with 90% confidence.

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