df = pd.read_csv('https://raw.githubusercontent.com/jbrownlee/Datasets/master/daily-total-female-births.csv') df['Births2'] = df['Births'] + np.random.normal(0, df['Births'].std(), [len(df)]).astype(int) df['Births3'] = df['Births'] + np.random.normal(0, df['Births'].std() * 2, [len(df)]).astype(int) df = df.loc[:50, :]