Question

what is the interquartile range of this data set?
A.6
B.8
C.9
D.20

Answer 1

The interquartile range, IQR, is equal to the difference of Q1 and Q3 (first and third quartiles). These markers are visually shown as the edges of the box.

IQR = Q3 - Q1
IQR = 36 - 16
IQR = 20

Final Answer: Choice D) 20