4000 is the number of members of the population surveyed which could result in sample statistic.
Answer: Option C.
<u>Explanation:</u>
Sample is a part of the population and not the whole population. Sample has a particular number out of the whole population that represents the features of the whole population and acts as the representative of the population from which the sample has been drawn.
There are certain formulas for deriving the number of members of the population that are to be included in the sample of that particular population. For the population being talked about in the question, the sample should have 4000 members in it if the population has members equal to the number of 400,000 people.
