CompTIA Data+ (DA0-001) — Question 174

Which of the following inferential statistical methods would be used to determine if there is a significant difference between the means of two groups?

Answer options

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

Correct answer: D

Explanation

The t-test is the appropriate method for comparing the means of two groups to see if any observed difference is statistically significant. The p-value is a measure used in hypothesis testing but does not itself test means. The Z-score is used for standard deviations in a normal distribution, and the Chi-squared test is applicable for categorical data, not means.