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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
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