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April 19, 2015

Homework Help: Statistics

Posted by Shyra on Thursday, December 2, 2010 at 12:59pm.

A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 12 hours, with a standard deviation of 3 hours. It is desired to estimate the mean viewing time within one quarter hour. The 0.95 degree of confidence is to be used. How many executives should be surveyed?

Is the following soluntion correct?
[(1.96*3)/0.25]^2 = 553.1 => 554

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