# Measures of Spread/Dispersion

## Range, variance, standard deviation

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Measures of Spread-Dispersion

by CK-12 //at grade
Describe what happens to the measures of central tendency and dispersion when new data points are added to a data set.
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## Understanding the Mean

by CK-12 //at grade
Learn to understand the mean and different statistical deviations.
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## IQR and Boxplots

by Laura Iossi //at grade
This Concept introduces students to the some of the measures of spread commonly used, such as range, standard deviation and variance.
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## Measures of Spread or Dispersion

by Cristine Fisher //at grade
Describe what happens to the measures of central tendency and dispersion when new data points are added to a data set.
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## Measures of Spread

by Carolyn Carroll //at grade
Describe what happens to the measures of central tendency and dispersion when new data points are added to a data set.
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## Mean and Deviation

by Rebecca Young //at grade
Learn to understand the mean and different statistical deviations.
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## Measures of Spread - Standard Deviation

by Rebecca Young //at grade
Describe what happens to the measures of central tendency and dispersion when new data points are added to a data set.
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• Video

## Measures of Dispersion: A Sample Application

by CK-12 //at grade
This video demonstrates a sample use of measures of dispersion.
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• Video

## Measures of Dispersion: An Explanation of the Concept

by CK-12 //at grade
This video provides an explanation of the concept of measures of dispersion.
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• Real World Application

## How Smart Was Einstein?

by CK-12 //at grade
Learn about the unique dispersion of IQ scores to find out how Einstein ranked.
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• Real World Application

## The Making of a Millionaire

by CK-12 //at grade
You can use your knowledge of standard deviation to improve your financial investments.
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