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→Comparing Means
*<nowiki>*</nowiki>''needs try to transform data into parametric (e.g., logarithmic), or other considerations''
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<!--
::The variance of whole combined observations is
::<math>\sum_{i=1}^n (x_i-\bar{x})^2</math>
::<math>= \sum_{i=1}^n x_i^2 - 2\bar{x} \sum_{i=1}^n x_i + \bar{x}^2 \sum_{i=1}^n 1</math>
--!>
==Comparing Survival time==
