CompTIA Data+ (DA0-001) — Question 165

A data analyst has received a data set that contains actual and projected sales for the fourth quarter of 2019. Which of the following statistical methods should the analyst use to find the measure of dispersion?

Answer options

• A. Mean
• B. Variance
• C. Correlation
• D. Confidence interval

Correct answer: B

Explanation

The correct answer is Variance, as it specifically measures the dispersion of data points in relation to the mean. Mean provides an average, Correlation assesses relationships between variables, and Confidence interval indicates the reliability of an estimate, but none of these directly measure variability.