import pandas as pd
raw_data = {'name': ['Willard Morris', 'Al Jennings', 'Omar Mullins', 'Spencer McDaniel'],
'age': [20, 19, 22, 21],
'favorite_color': ['blue', 'blue', 'yellow', "green"],
'test_one': [88, 92, 95, 70],
'test_two': [78, 100, 90, 85]}
df = pd.DataFrame(raw_data)
df
df['test_average'] = (df.test_one + df.test_two)/2
df.head()