What is the interquartile range for the following set of scores: 6, 8, 10, 12, 12, 12, 14, 15, 16, 16, 17, 17?
A) 5
B) 11
C) 13
D) 16

Question

Quizplus · Accepted Answer

The interquartile range (IQR) is the difference between the third quartile (Q3) and the first quartile (Q1). For the given set, Q1 is the median of the first half (10), and Q3 is the median of the second half (16), so IQR = Q3 - Q1 = 16 - 11 = 5.

What Is the Interquartile Range for the Following Set of Scores