Posted by karen on Friday, August 20, 2010 at 12:43pm.
My TI 30x calculated it rather quickly. I am not certain of your question.
Calculate the mean, then the difference between the mean and each data point, square it, then sum the squares, then divide by n.
http://www.mnstate.edu/wasson/ed602calcvardevs.htmhttp://www.mnstate.edu/wasson/ed602calcvardevs.htm
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