Question

Which of the following is typical of the selection of survey participants?

Answer 1

Answer:

D.) They must be representative of the population.

Explanation:

In general a sample collected from a set of naturally distributed data set must also follow the bell curve or natural distribution

In other way round it can be said that sample set must have the same characteristics as that of the main set and hence a sample must be representative of the population.

Option D is correct

Answer 2

D. they must be representative of the population