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- Mar 16th 2013, 07:11 AM #1

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## Can anyone help?

- Mar 16th 2013, 07:52 AM #2

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## Re: Can anyone help?

Is your question

Show that

$\displaystyle \sigma x^2=\sum \frac{x_i^2}{N}-\sum \frac{x_i}{N}$

Becomes

$\displaystyle \sigma x^2=(\sum \frac{x_i^2}{N})-\mu x$

All sums between i=1 and N

- Mar 16th 2013, 08:18 AM #3

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- Mar 16th 2013, 09:10 AM #4

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- Mar 16th 2013, 10:13 AM #5

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