Which of the following statements is true about stratified random sampling?
A) Allows the researcher to use a smaller sample size
B) Ensures obtaining a larger sample at lower cost
C) Internal validity is strengthened with this type of sampling
D) Involves the selection of certain subjects from a convenience sample

Question

Quizplus · Accepted Answer

With stratification, the researcher can use a smaller sample size and achieve the same degree of representativeness in relation to the stratified variable as a large sample acquired through simple random sampling.
There is no assurance of a larger sample.
Internal validity is not necessarily strengthened with stratified random sampling over random sampling.
Subjects are still selected through a probability process.

Which of the Following Statements Is True About Stratified Random