How to Calculate Sample Size and Why

ABSTRACT

WHY Calculating the sample size is essential to reduce the cost of a study and to prove the hypothesis effectively. HOW Referring to pilot studies and previous research studies, we can choose a proper hypothesis and simplify the studies by using a website or Microsoft Excel sheet that contains formulas for calculating sample size in the beginning stage of the study. MORE There are numerous formulas for calculating the sample size for complicated statistics and studies, but most studies can use basic calculating methods for sample size calculation.