import numpy as np

def outlier_treatment(datacolumn):
    sorted(datacolumn)
    Q1, Q3 = np.percentile(datacolumn, [25, 75])
    IQR = Q3 - Q1
    lower_range = Q1 - (1.5 * IQR)
    upper_range = Q3 + (1.5 * IQR)
    return lower_range, upper_range

