Formula For Sample Size Determination. Nowadays the use of specialist software for sample size determination such as NQuery PASS or Power and Precision is common. 1 Ne 2.
If N100 then the corrected sample size would be 18600285 6526 or 66. Moreover taking a too large sample size would also escalate the cost of study. Therefore the sample size is an essential factor of any scientific research.
In order to estimate the sample size we need approximate values of p 1 and p 2.
Estimating a population proportion with specified relative precision a Anticipated population proportion b Confidence level c Relative precision P 1001-IX E The choice of P for the sample size computation should be as conserva. Sathian 2010 has pointed out that sample size determination is a difficult process to handle and requires the. 196 for 95 confidence level p percentage picking a choice expressed as decimal. How to make sure you get the correct sample size.
