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angeloped/std_deviation.py

Created June 18, 2022 23:33
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Python implementation of standard deviation.
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std_deviation.py
import math
# https://en.wikipedia.org/wiki/Unbiased_estimation_of_standard_deviation
def std_deviation(items, mean):
sum_ = sum([(i-mean)**2 for i in items])
N = len(items) # the size of the population
return math.sqrt(sum_ / (N-1))
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