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January 28, 2015

January 28, 2015

Posted by **Pat** on Saturday, January 28, 2012 at 3:11pm.

- statistics -
**PsyDAG**, Sunday, January 29, 2012 at 11:33amMean = Σx/n

Σx = n * mean1 = 30 * 77 = 2310

Σx = n * mean2 = 6 * 83 = 498

total mean = (2310+498)/(30+6) = ?

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