Which of the following statements is true with respect to sample size?
A) use small samples when mailing questionnaires
B) the greater the number of subgroups of interest to the study, the larger the sample
C) more subjects are always better
D) large samples increase sampling error

Question

Quizplus · Accepted Answer

As the number of subgroups of interest increases, the variability within those subgroups also increases, requiring larger sample sizes to provide reliable results.

Which of the Following Statements Is True with Respect to Sample