Question

Identify an outlier in the data set below, if one exists.
{0.3, 1.5, 3.8, 2.6, 1.5, 9.1, 4.2, 3.8, 1.5, 2.9}
A. 0.3
B. 1.5
C. 9.1
D. This data set contains no outliers.

Answer 1

An outlier is a number in a set of data that is unusually larger or smaller than the rest of the numbers in the data.

In this case 9.1 is much larger than the rest of the numbers.
So 9.1 is your outlier.