Which statement is correct?
A)Judgment sampling is preferred to systematic sampling.
B)Sampling without replacement introduces bias in our estimates of parameters.
C)Cluster sampling is useful when strata characteristics are unknown.
D)Focus groups usually work best without a moderator.

Question

Quizplus · Accepted Answer

Cluster sampling is useful when strata characteristics are unknown because it divides the population into groups, or clusters, and then randomly selects some of these clusters to sample, which can save time and money compared to other sampling methods. Judgment sampling is subjective and can introduce bias, sampling without replacement is more common than with replacement and does not necessarily introduce bias, and focus groups require a skilled moderator to effectively facilitate the discussion.

Which Statement Is Correct