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tristanstraub/mean-of-means-not-mean

Created June 5, 2019 06:48
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mean-of-means-not-mean
(def values
[[(/ 1.0 2.0)
(/ 1.0 2.0)]
[(/ 1.0 3.0)
(/ 1.0 3.0)
(/ 1.0 3.0)]])
(defn mean
[xs]
(/ (double (reduce + xs)) (count xs)))
(clojure.test/deftest mean-of-means-not-mean
(clojure.test/is (not (= (mean (map mean values))
(mean (flatten values))))))
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