Averages/Root mean square: Difference between revisions

Added Haskell.
(Added Haskell.)
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C.f. [[Averages/Pythagorean means]]
 
=={{header|Haskell}}==
Given the <code>mean</code> function defiend in [[Averages/Pythagorean means]]:
 
<lang haskell>main = print $ mean 2 [1 .. 10]</lang>
 
=={{header|Lua}}==
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