Grade 10 Math Worksheet: Variance
This worksheet focuses on understanding and calculating variance for discrete data sets, including problems involving frequency distributions.
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Grade 10 Math: Variance
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Read each question carefully and show all your work. Round your answers to two decimal places where necessary.
1. Explain in your own words what variance measures in a set of data.
2. The square root of the variance is known as the .
3. A high variance indicates that data points are from the mean, while a low variance indicates they are the mean.
4. Which of the following is NOT a unit of variance?
Square units of the original data
Units of the original data
No units (dimensionless)
It can have any of the above depending on context
5. Calculate the variance for the following set of data: 12, 15, 18, 20, 25.
6. A small class of students scored the following marks on a quiz:
Marks: 5, 6, 7, 8, 9
Frequency: 2, 4, 6, 4, 2
Calculate the variance of the quiz scores.
7. Variance can be a negative value.
True
False