Standard Deviation Formula

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Post Date September 11, 2009
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How to Solve Problems Using the Standard Deviation Formula

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Description

A detailed tutorial on the solving of the standard seviation formula. Step by step tutorial including several examples of how to solve standard deviation for reference.

Overview

Standard deviation is a measure of dispersion in statistics. If this is high, then the results are very scattered, but if this is low, then the results are all about the same. The standard deviation formula is as follows:

\sigma = \sqrt{\frac{1}{N} \left(\left(\sum_{i=1}^N x_i^2\right) - N\overline{x}^2\right)} = \sqrt{\frac{1}{N} \left(\sum_{i=1}^N x_i^2\right) - \overline{x}^2}.</strong><strong>

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