To assess the presidential candidate preferences of the registered voters in Maricopa county, classified by social class and age, a researcher randomly selects voters from each subgroup according to their proportion in the entire county. This sampling technique is called _____ sampling.
A)quota
B)haphazard
C)simple random
D)stratified random

Question

Quizplus · Accepted Answer

The sampling technique described is stratified random sampling, which involves dividing the population into subgroups (in this case, social class and age) and then randomly selecting samples from each subgroup in proportion to their size in the entire population. This helps ensure that each subgroup is represented in the sample, which can improve the accuracy and representativeness of the results.

To Assess the Presidential Candidate Preferences of the Registered Voters