Numpy Select Elements из условия массива
import numpy as np
data = np.array([150000, 125000, 320000, 540000, 200000,
120000, 160000, 230000, 280000, 290000, 300000,
500000, 420000, 100000, 150000, 280000])
stdev = data.std()
aver = data.mean()
lower = aver-stdev
upper = aver+stdev
onestdev = data[(data<upper) & (data>lower)]
Edi Sugiarto