Answer:
The interquartile range is 0.8.
Step-by-step explanation:
It's 0.8 because the median is 8 and the median of the left side is 4 and 5 so, you have to divide them both and you get 0.8.
11 - 4 = 7
(3, 4, 5) (8) (9, 11, 12)
Median of the data set: 8
Median of the lower range: 4
Median of the higher range: 11
11-4=7
