1. Which of the following is a measure of central tendency?

A. Standard deviation

B. Range

C. Median

D. Variance

Answer: C. Median

Rationale: The median is a measure of central tendency that represents the

middle point of a data set when arranged in order.

2. What does the standard deviation measure?

A. Spread of data

B. Center of data

C. Outliers in data

D. Frequency of data

Answer: A. Spread of data

Rationale: The standard deviation measures how spread out the values in a

data set are around the mean.

3. Which of the following is a measure of dispersion?

A. Mean

B. Mode

C. Median

D. Range

Answer: D. Range

Rationale: The range is a measure of dispersion that represents the

difference between the highest and lowest values in a data set.

4. What is the formula for calculating variance?

A. (Sum of data values)^2

B. Sum of squared deviations from the mean divided by sample size

C. Sum of data values divided by sample size

D. (Mean)^2

Answer: B. Sum of squared deviations from the mean divided by sample

size