February 19, 2017

Homework Help: Stastics

Posted by WEB on Saturday, November 5, 2011 at 10:42pm.

A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 98% confident that the true mean is within 2 ounces of the sample mean? The standard deviation of the birth weights is known to be 5 ounces.
A) 34
B) 5
C) 33
D) 6

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