History
The term standard deviation was first used in writing by Karl Pearson in 1894, following his use of it in lectures. This was as a replacement for earlier alternative names for the same idea: for example, Gauss used mean error. It may be worth noting in passing that the mean error is mathematically distinct from the standard deviation.
Read more about this topic: Sample Standard Deviation
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—Gertrude Stein (18741946)
“The history of all hitherto existing society is the history of class struggles.”
—Karl Marx (18181883)
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—Jonathan Raban (b. 1942)