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<!--
::The variance of whole combined observations is
::<math>s^2=\frac{\sum_{i=1}^n (x_i-\bar{x})^2}{n-1}</math>
::The numarator is ''sum of square''
::<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 Means
::<math>n</math> is sample size (whole combined number of observations)
::<math>k</math> is number of groups
|style="vertical-align:top"|
*<nowiki>*</nowiki>''needs try to transform data into parametric (e.g., logarithmic), or other considerations''
|}
<!--
::The variance of whole combined observations is
::<math>s^2=\frac{\sum_{i=1}^n (x_i-\bar{x})^2}{n-1}</math>
::The numarator is ''sum of square''
::<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>
--!>
