อุณหภูมิสูงสุดเฉลี่ยในแต่ละวันในสัปดาห์คือเท่าใด?
What is the average high temperature for each day of week?
df = pd.DataFrame(columns=['day_of_week', 'high_temperature'])
df.groupby('day_of_week')['high_temperature'].mean()