Stratified random sampling is a method of sampling that divides a population into smaller groups that form the basis of test ...
A simple random sample is a subset of a statistical population where each member of the population is equally likely to be ...
Categorical Variable: the variable whose values can be put into categories (groups). Cluster Sampling: a researcher divides the population into clusters. Then, a simple random sample of the clusters ...
Probability sampling has enjoyed a privileged position for good survey practice since the beginning of last century. Jerzy Neyman (1934) decisively contributed to this situation with his theory for ...