Inter quartile range 20, 10 , 30 ,40 help please

The interquartile range is 30

Step-by-step explanation:

Here, we want to get the interquartile range

We start by arranging the numbers in order

10,20,30,40

The first quartile is;

(n + 1)/4 th term = (4+ 1)/4 = 5/4 = 1.25

This is approximately the first term = 10

Q3 is the third quartile

That is;

3(n + 1)/4 = 3(5)/4 = 15/4 =3.75

This is approximately the 4th term = 40

The interquartile range is the difference between the first and third quartile

Mathematically, we have that as;

40 - 10 = 30

10 * 563.67 = 5636.7

the graph on the bottom right