data standardization

 

?

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import random import numpy as np   l, num, gen_min_, gen_max_ = [], 100, 1, 200   l = [random.randint(gen_min_, gen_max_) for i in range(0, num, 1)] l_std, l_average = np.std(l), np.average(l) ll = [(i - l_average) / l_std for i in l] sum_ll = sum(ll)

　　不等于1