# The purpose of measures of central tendency is to describe the variability within a data set. Is this true or false? Why?

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MeneerNask
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Feb 21, 2017

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False

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The central measure says nothing about how the data is grouped around it.

**Example:**

In test scores the central measure (mean or median) is 50.

This could mean that everyone has a score between 45 and 55, OR it could mean that the scores are all over the page, and just happen to give a mean (or median) of 50.

(45-50-55 and 1-50-99 both give a mean and median of 50).

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