Question

The police department of a city with a population of 250000 wants to know how many residents wear their seatbelts regularly. which sample size would make the study most reliable?

A. 2500
B. 250
C. 5
D. 25

Answer 1

A 2500 you want the biggest sample size possible for more accurate results

Answer 2

Option A is correct.

Explanation:

Given:

Population of the city is 250,000

Police department wants to know how many residents wear their seat belts regularly.

To find: Sample size for the study which make it most reliable.

Most reliable study means study which produce most accurate result.

We know that a study can produce most accurate result only when the sample size if as possible large.

So, among given options Only Possible Sample Size is 2500

Therefore, Option A is correct.