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
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