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Pooled Sample Standard Deviation


S_p \;=\;\sqrt{\frac{(n_1-1) \times S_1 \;^2 +(n_2-1)\times S_2 \;^2}{n_1+n_2-2}

edited Jun 21 '19 at 04:04 Asked Jun 18 '19 at 20:04 by Lucy




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