What is the first quartile of this data set?

11, 12, 15, 16, 17, 19, 22, 24, 29, 33, 38

A. 11

B. 29

C. 19

D. 15

First we have to find the median

The median is 19 when we cross off all the numbers

Now we have 11 12 15 16 and 17 in the first quartile

Cross 11 and 12 and cross 16 and 17, off which leaves you with 15

Answer is option d