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April 25, 2015

Homework Help: statistics

Posted by Julio on Wednesday, June 6, 2012 at 9:58am.

In a random sample of 50 babies 4 to 7 month old the average number of hours they slept per day turned out to be 14.2 hours with a standard deviation of 1.6 hours find and interpret a 90% confidence interval for the mean number of hours slept by babies at this age

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