Question

A survey is to be given to middle school students about what after school activities they prefer. During each lunch period, every fifth student was asked about their activities.



Which description BEST represents the sample?



A.
representative of the population and random

B.
not representative of the population and random

C.
representative of the population and not random

D.
not representative of the population and not random

Answer 1

A.

Every 5th student during each lunch period is a systematic sample taken across the whole student body at lunch. Systematic sampling (assuming no periodic pattern in the ordering) gives a random, representative sample of the population.