A doctor treated 24, 27, 31, 19, 26, 15, and 19 patients during the past 7 days. Which is the median number of patients treated by the doctor?

We are tasked to solve for the median of the doctor's patients during the last 7 days that he was on duty. The given numbers are the following:

24, 27, 31, 19, 26, 15 and 19

Solving for the median, we have:

Median = (24 + 27 + 31 + 19 + 26 + 15 + 19) / 7 days

Median = 23

The median is 23.