CompTIA Data+ (DA0-001) — Question 143

Which of the following statistical methods can be used to measure changes over time?

Answer options

• A. Correlation test
• B. Independent chi-squared test
• C. Dependent t-test
• D. Z-test

Correct answer: C

Explanation

The Dependent t-test is the correct answer because it is specifically designed to compare means from the same group at different times, making it suitable for measuring changes over time. The Correlation test assesses relationships between variables, the Independent chi-squared test compares categorical variables, and the Z-test is used for comparing sample and population means, but does not focus on changes over time.