Which of the following are true with respect to representativeness?
A) a sample represents a population's if it is exactly the same on all relevant variables
B) a sample is representative if it approximates the population
C) a sample needs to be representative of the population on all variables
D) a representative sample is only obtained when a simple random sample is used

Question

Quizplus · Accepted Answer

It is rare for a sample to be exactly the same as the population on all relevant variables (option A) and not necessary for a sample to be representative on all variables (option C). While a simple random sample is one way to obtain a representative sample, other sampling methods can also be used. Therefore, option D is also incorrect. Option B is correct because a representative sample does not need to be an exact match to the population, but should approximate it to a reasonable degree.

Which of the Following Are True with Respect to Representativeness