Samples and their Size: The Bane of Researchers (Part I).

H seen what is a “sample”, what are the characteristics of a good sample and how to go about constructing it (probability and nonprobability methods), l e t u s n o w u n d e r s t a n d t h e principles of determining what is an “appropriate size” for the sample and how to calculate it for diverse study designs. We also discuss what can go wrong and what precautions you must exert while calculating the sample size and finally introduce readers to some free online software options that help you with the calculations.