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# Why do we need the quadratic mean How is it better than the average mean?

Updated: 11/1/2022

Wiki User

6y ago

The quadratic mean is a measure of the spread of values about their arithmetic mean. By definition, the arithmetic mean of the differences will be zero and so adds no information. Another measure is required and that is the quadratic mean.

Wiki User

6y ago

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Q: Why do we need the quadratic mean How is it better than the average mean?
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