An observation is considered an outlier if it is below: An observation is considered an outlier if it is above:

Question

The five number summary of a dataset was found to be:

47, 49, 58, 66, 70

An observation is considered an outlier if it is below:

An observation is considered an outlier if it is above:

Answer 1

Hi Anni,

A number is an outlier if it’s 1.5*IQR below Q₁ or 1.5*IQR above Q_3.

IQR=Q₃-Q₁= 66-49=17

1.5*IQR=25.5

Q₁-25.5=49-25.5=23.5 (answer 1)

Q₃+25.5=66+25.5=91.5 (answer 2)

I hope this helps!