Sampling and Sample Size
Sampling and sample size are two important aeras where statistics is needed. This is extreamely important if results are to be considered valid and generalizable. There are many different methods of sampling - simple random sampling, stratified sample, cluster sampling and systematic sample, among others. Each involved the use of statistics in ascertaining to what extent they are representative of the population they are draw from. In simple randomsampling, the sample should be drawn from the population where each member has an equalchance of being selected. Hence, statistics ensures thatthere is generalizablity in the findings.