For a simple random sample, each case and each combination of cases in the population must________.
A) be representative.
B) be included in the sample.
C) be contacted by the researcher.
D) have an equal probability of being chosen for the sample.

Question

Quizplus · Accepted Answer

In a simple random sample, each case and each combination of cases in the population must have an equal probability of being chosen for the sample. This ensures that the sample is unbiased and representative of the population. Options A, B, and C are not requirements for a simple random sample, although they may be desirable in certain cases.

For a Simple Random Sample, Each Case and Each Combination