Use the given data to find the minimum sample size required

Use the given data to find the minimum sample size required to estimate a population proportion or percentage.

Margin of error: 0.08; confidence level 90%; p & q unknown

(Round up to the nearest integer.)

n= ___

Solution

Compute Sample Size ( n ) = n=(Z/E)^2*p*(1-p)
Z a/2 at 0.1 is = 1.645
Samle Proportion = 0.5
ME = 0.08
n = ( 1.645 / 0.08 )^2 * 0.5*0.5
= 105.704 ~ 106