What is the third quartile of the following data set 24 20 35 43 28 36 25 29 44 21 37

Putting the data in ascending order, we get:

20, 21, 24, 25, 28, 29, 35, 36, 37, 43, 44

The median is in the middle and is 29.

The third quartile is the median of the set {35, 36, 37,43,44} and is therefore 37.