# Variance of a Data Set

## The mean of the squares of the deviation of data values

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## Variance of a Data Set

by CK-12 //basic
Covers the variance for a normally distributed random variable.
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## Variance of Normally Distributed Data Principles

by CK-12 //basic
This video gives more detail about the mathematical principles presented in Variance of Normally Distributed Data.
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## Variance of Normally Distributed Data Examples

by CK-12 //basic
This video shows how to work step-by-step through one or more of the examples in Variance of Normally Distributed Data.
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## Standard Deviation

by CK-12 //basic
Examines the statistical concept of standard deviation, which is used to characterize the spread of a distribution. The video also differentiates between sample standard deviations and population standard deviations and introduces the formulas.
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• Real World Application

## Driving Forces

by CK-12 //basic
Use statistics to analyze how car ownership is changing in the United States.
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