Anatomy: The human height is the distance from head to toe. When populations sha

Question

Anatomy: The human height is the distance from head to toe. When populations share a genetic background and other environmental factors such as diet, the average height is frequently characteristic within a group. In a large group of Caucasians, how many individuals must be measured to determine the mean height of a male within 5 inches at the 90% degree of confidence given the variance is 15 inches? Interpret the meaning of your results and state any assumptions you have made to obtain the approximate sample size.

Explanation / Answer

Compute Sample Size
n = (Z a/2 * S.D / ME ) ^2
Z/2 at 0.1% LOS is = 1.64 ( From Standard Normal Table )
Standard Deviation ( S.D) = 3.873
ME =5
n = ( 1.64*3.873/5) ^2
= (6.352/5 ) ^2
= 1.614 ~ 2      

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