The method in which the sample is taken from each predefined strata of society is called?: (A) Simple random sampling, (B) Systemic sampling, (C) Stratified sampling, (D) Multistaged sampling
Answer is C. In simple random sampling the samples are taken completely at random from a given population. In systemic sampling samples are taken according to a predetermined periodicity. In multistaged sampling, the researcher randomly selects elements from each cluster instead of using all the elements contained in the selected clusters.