more math

Here's the formula for standard deviation.

\sigma^2 = \frac{\Sigma_{i=1}^{N} (x_i - \bar{x})^2}{N}

2 \sigma = \frac{2 s}{6 \sqrt{100}}

http://cs.marlboro.edu/ courses/ spring2006/ wiki/ more_math
last modified Thursday August 31 2006 2:24 am EDT

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