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Variance formulas Practice
Recall population and sample variance formulas.
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What you’ll practice
Population and sample variance use different denominators. Keep the appropriate mean and denominator together in the recalled expression.
Where this helps
Remembering the correct denominator and squared deviations.
Before you start
Use this topic to practice math you have already learned. The examples show the available kinds of recall tasks; this is not a complete textbook chapter. Check the answer form and any stated conditions.
Try a few examples
Real practice. Real progress.
Example 1 of 2
N is a positive integer, mu is the population mean, and x_1 through x_N are finite population values.
Choose the exact expression.
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Start practicingVariance formulas
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