# Measures of Variability : Mean Absolute Deviation

**is a measure of dispersion that gives the average variation of the data from the mean.**

*mean absolute value deviation*Example: find the mean absolute value deviation from the given data:

Let's start with the formula:

Where x

_{1}is the first term and x

_{2}is the second term and so on....

is the mean average:

n is the number of terms in the data = 5

Now let's substitute the information into the formula:

=

=

*21.2 mean absolute deviation*

**Summarize**: to find the

**you will need to find the average of the data, the number of terms and then substitute that information in to the formula and simplify.**

*mean absolute value deviation*
Related Links:Math algebra Measures of Variability : Interquartile Range Measures of Variability : Range |

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