Homework Help: Statistics

Posted by Pat on Monday, June 25, 2012 at 9:13pm.

A study was conducted in order to estimate u, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults give a mean weekly computer usage time of 8.5 hours and that from prior studies , the population standard deviation is assumed to be 3.6 hours.

Statistics - PsyDAG, Tuesday, June 26, 2012 at 10:52am
Are you looking for the confidence interval?

What level of significance are you using?

95% = mean ą 1.96 SEm

SEm = SD/√n

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