Variance Quizzes, Questions & Answers

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Top Trending Variance Quizzes

Variance Calculation Quiz: Calculating Variance (Basic Level)

Ever wondered how far numbers drift from their average? This quiz walks you through basic variance problems that show how spread works within a data set. You’ll compare values, measure deviations, and see how variance...

Questions: 20 | Attempts: 22 | Last updated: May 7, 2026

Sample Question 1
What is the population variance of the data set {2, 4, 6, 8, 10}?

6

7

8

9

Sample Question 2
What is the sample variance of the data set {6, 8, 10}?

1

2

3

4

Sample Question 3
Adding the same constant to every value in a data set does not change the variance.

True

False

Recent Variance Quizzes

Sample Population Variance Quiz: Sample vs. Population Variance

Questions: 20 | Attempts: 12 | Last updated: May 11, 2026

Sample Question
Which of the following is the correct formula for population variance?

S² = Σ(x − x̄)² ÷ n

S² = Σ(x − x̄)² ÷ (n − 1)

σ² = Σ(x − μ)² ÷ N

σ² = Σ(x − μ)² ÷ (N − 1)

Interpreting and Applying Variance in Real-World Data Quiz

Questions: 20 | Attempts: 11 | Last updated: Jan 22, 2026

Sample Question
A factory measures the weights of cereal boxes. The variance of the weights is 0.04 oz². What does this tell us about the production process?

The boxes vary widely in weight

The average weight is 0.04 ounces

The production process is unreliable

The boxes are fairly consistent in weight

Understanding Variance as a Measure of Spread

Questions: 21 | Attempts: 15 | Last updated: Jan 22, 2026

Sample Question
What does variance measure in a data set?

The middle value of the data

The most frequently occurring value

How spread out the data values are from the mean

The difference between the maximum and minimum values

Calculating Variance from Data Sets

Questions: 26 | Attempts: 10 | Last updated: Jan 22, 2026

Sample Question
What is the mean of Data set A?

7

7.5

8.5

8