Question

What is the interquartile range of this data set?

10, 12, 16, 9, 8, 15, 15, 7, 11, 14
A)6
B)7
C)12
D)17

Answer 1

The answer is absolutely a) 6.

Explanation:

I took the test

Answer 2

Here, there are 10 numbers, first we have to range the numbers less to greater.

7 ; 8 ; 9 ; 10 ; 11 ; 12 ; 14 ; 15 ; 15 ; 16


`0.25*10=2.5` so Q1 is the third term. Q1 = 9.


`0.75*10=7.5` So Q3 is the 8th term. Q3 = 15.


`Q_(3) - Q_(1) = 15-9=6`

In short, interquartile range of this data set is 6 ( option A) ).

Hope this helps !

Photon