Anatomy The human height is the distance from head to toe Wh

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 true 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.

Solution

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) = 3.872
ME =5
n = ( 1.64*3.872/5) ^2
= (6.35/5 ) ^2
= 1.613 ~ 2