import pandas as pd

tips = pd.read_csv("https://milliams.com/courses/data_analysis_python/tips.csv")

bill_per_person = tips["total_bill"] / tips["size"]
bill_per_person

0       8.495000
1       3.446667
2       7.003333
3      11.840000
4       6.147500
         ...    
239     9.676667
240    13.590000
241    11.335000
242     8.910000
243     9.390000
Length: 244, dtype: float64

bill_per_person.mean()

7.888229508196722

bill_per_person.std()

2.9143496626221

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