takes either a sample or a sample and a precalculated mean.
returns the sum of the squares of the difference between each observation and the sample mean.
Source
incanter/stats.clj:2631
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(defn sum-of-square-devs-from-mean "takes either a sample or a sample and a precalculated mean. returns the sum of the squares of the difference between each observation and the sample mean." ([x] (sum-of-square-devs-from-mean x (mean x))) ([x m] (apply + (square-devs-from-mean x m))))
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