Using Slovins formula the required sample survey size equals. Sample Size z 2 p1-p e 2 1 z 2 p1-p e 2 N N population size. Moreover taking a too large sample size would also escalate the cost of study.
E margin of error.
3rd use the appropriate formula to calculate the sample Example 1. If you have a small to moderate population and know all of the key values you should use the standard formula. We now consider the issues. Employment from each sample and use it as an estimate of the population average.