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Variability is a measure of how much each score in a group of scores differs from the mean value.

What are variance, mean and standard deviation?

Variance measures how far each number is from the mean value. While the mean value is the average of all given numbers in the table.

Standard deviation measures the data on how dispersed the numbers are in relation to the mean. If data is closed to the mean it means lower the standard deviation and higher the standard deviation means how far data is from the mean.

Therefore variance is the distance from the mean.

Learn more about Variance, Mean and Standard deviation here.

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