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import pandas as pd

# %matplotlib inline
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# ![''](./04_src/04_21_01.png)
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# ![''](./04_src/04_21_02.png)

df = pd.DataFrame({'Older':[9, 4, 7, 3, 8, 6, 2, 8, 4, 5, 7, 5, 2, 6, 6], 
                   'Younger':[7, 9, 6, 7, 8, 6, 7, 6, 6, 8, 9, 7, 8, 6, 9]})
df

df.describe()



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# ![''](./04_src/04_22_01.png)
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# ![''](./04_src/04_22_02.png)

df = pd.DataFrame({'Younger':[8, 6, 6, 7, 8, 7, 8, 8], 
                   'Older':[7, 5, 8, 5, 7, 6, 8, 5]})
df

df.Younger.var(), df.Older.var()







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