Question

Which of the following is an advantage of using stratified random sampling?

A-Stratified random sampling saves time and money.
B-Stratified random sampling requires knowledge of the entire population.
C-Stratified random sampling can be used even when there is not a list of the population
D-Stratified random sampling provides more precise estimates than simple random sampling.

Answer 1

A - Stratified random sampling reduces sampling variability.

Explanation:

saw it on the review

Answer 2

the answer would be D, i am not 100 sure tho