Question

What is the interquartile range (IQR) of the following data set?
6, 7, 9, 10, 14, 16, 18, 20

a.14
b.12
c.8
d.9

Answer 1

a range tends to be a few numbers

IQR is q25 to q75

Answer 2

meant p25 and p75 :)

8 points

8*.25 = 2, so we average the 2nd and 3rd spots

8*.75= 6, so we average the 6th and 7th spots

and the range will be between those values

Answer 3

6, 7, 9, 10, 14, 16, 18, 20
___ ___
8 17

the IQR should be from 8 to 17

Answer 4

thanks the IQR is 9