Which of the following yields a stratified sample?
A)All students in a class are divided into groups of 15.One student is randomly chosen from the 1st group,the remaining observations are every 15th student thereafter.
B)The best 15 students,according to the opinion of the instructor,in a class are selected.
C)All students in a class are grouped according to their gender.A random sample of 8 is selected from the males and a separate random sample of 7 is drawn from the females.
D)The first 15 students in a class are selected without replacement.

Question

Quizplus · Accepted Answer

Stratified sampling involves dividing the population into subgroups (or strata) and then taking a random sample from each subgroup. Option C involves dividing the population into two strata (males and females) and taking a random sample from each subgroup. Choices A and D involve simple random sampling, where each individual in the population has an equal chance of being selected. Option B involves purposive sampling, where the researcher specifically selects a certain group within the population to participate in the study.

Which of the Following Yields a Stratified Sample