AILET 2018 Phd Question Paper with answer key for online practice

Question : 95 of 100

Marks: +1, -0

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

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

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