Question

what does it mean when a part of the population is under - represented? choose the correct answer below. a. a part of the population is under - represented when it is proportionally smaller in its population than in a sample. b. a part of the population is under - represented when their answers on a survey tend not to reflect their true feelings. c. a part of the population is under - represented when individuals selected to be in the sample who do not respond to the survey have different opinions from those who do. d. a part of the population is under - represented when it is proportionally smaller in a sample than in its population.

Explanation:

Under - representation in sampling means a subgroup has a smaller proportion in the sample compared to its proportion in the population. Option A has the proportion relationship reversed. Option B refers to response bias, not under - representation. Option C refers to non - response bias.

Answer:

D. A part of the population is under - represented when it is proportionally smaller in a sample than in its population.