CompTIA Data+ (DA0-001) — Question 123

A data analyst needs to collect a similar proportion of data from every state. Which of the following sampling methods would be the most appropriate?

Answer options

• A. Systematic sampling
• B. Convenience sampling
• C. Stratified sampling
• D. Random sampling

Correct answer: C

Explanation

Stratified sampling is the correct choice because it ensures that each subgroup, or stratum, is represented proportionally in the sample. The other methods, such as systematic, convenience, and random sampling, do not guarantee that each state will be equally represented, which is essential in this scenario.