what does variance measure?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.2: Box-and-whisker Plots
Problem 1E
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what does variance measure?

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Variance:

Variance measures absolute variability in a data set, calculated with respect to the mean. That is, variance is the mean square deviation about the mean.

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