Discuss Population and sampling and apply the study in the Effects of using industrial theatre…

➤ Why is stratified or cluster sampling recommended when studying industrial theatre effects?
Stratified sampling reduces error when employment relationship outcomes vary by job level, department, or tenure. Cluster sampling saves cost across many sites but needs larger samples because of intra-cluster correlation. Both methods support valid subgroup comparisons; adjust analysis with multilevel models and include design effects in power calculations.