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Newky/stdev_sample

Last active December 29, 2015 18:49
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stdev_sample
def stdev_sample(n):
diff = sum(n) / len(n)
diff_n_squared = map(lambda x: (x-diff) ** 2, n)
variance = sum(diff_n_squared) / (len(diff_n_squared) -1)
return math.sqrt(variance), variance
stdev_sample([1.23, 1.25, 1.21, 1.55])
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