Question

In a box-and-whisker plot, the interquartile

range is a measure of the spread of the
middle half of the data. Find the interquartile
range for the data set: 10, 3, 7, 6, 9, 12, 13.

Answer 1

IQR=8

Explanation:

write numbers in ascending order

3 6 9 10 12 13

find the middle, in this case, it's two numbers (10 and 12)

3 6 are on the left, find the middle between them; 3+6/2

4.5

12 and 13 are on the right, find the middle between them;

12+13/2

12.5

IQR=12.5-4.5