Recognize that a measure of center summarizes all values with a single number

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6.SP.A.3

Recognize that a measure of center for a numerical data set summarizes all of its values with a single number, while a measure of variation describes how its values vary with a single number.

What you'll learn

Explain that a measure of center summarizes a distribution with one number representing a typical value.
Explain that a measure of variation summarizes with one number how spread out the values are.
Compute the **mean** of a small data set and interpret it as the leveling value.
Compute the **median** of a data set (odd or even count) and interpret it as the positional middle.
Compute the **range** of a data set and interpret it as a measure of variation.
Recognize that a single number cannot capture every feature of a distribution -- and that mean and median can disagree, with the gap reflecting the distribution's shape.

Review first:

Understand that a set of data has a distribution

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Mean median range

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