Posted by Nathalia on Sunday, October 30, 2011 at 5:45pm.
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 15 hours, with a standard deviation of 3.5 hours. It is desired to estimate the mean viewing time within onequarter hour. The 98 percent level of confidence is to be used.
How many executives should be surveyed?

statistics  1, Thursday, June 5, 2014 at 8:18am
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