CompTIA Data+ (DA0-001) — Question 242

An analyst wants to compare a student's test performance to the overall performance of other students. Which of the following statistical methods would be best for this comparison?

Answer options

• A. p-value
• B. Z-score
• C. t-test
• D. Correlation

Correct answer: B

Explanation

The Z-score is the most appropriate method for comparing an individual student's performance against the average, as it standardizes scores based on the mean and standard deviation of the group. The p-value is used for hypothesis testing, the t-test is for comparing two groups rather than an individual to a population, and correlation measures the relationship between two variables rather than performance comparison.