Which of the Following Is Not True About Stratified Random

Multiple Choice

Which of the following is not true about stratified random sampling?

A) It involves a random selection process from identified subgroups
B) Proportions of groups in the sample must always match their population proportions
C) Disproportional stratified random sampling is especially helpful for getting large enough subgroup samples when subgroup comparisons are to be done
D) Proportional stratified random sampling yields a representative sample