Question

which data set has an outlier?
25, 36, 44, 51, 62, 77
3, 3, 3, 7, 9, 9, 10, 14
8, 17, 18, 20, 20, 21, 23, 26, 31, 39
63, 65, 66, 69, 71, 78, 80, 81, 82, 82

Explanation:

Step1: Recall outlier concept

An outlier is a data - point that is significantly different from other data - points.

Step2: Analyze first dataset

The numbers 25, 36, 44, 51, 62, 77 increase relatively smoothly with no extreme values.

Step3: Analyze second dataset

The numbers 3, 3, 3, 7, 9, 9, 10, 14 are mostly in the single - digit and low double - digit range, and 14 is not extremely far from the others.

Step4: Analyze third dataset

The numbers 8, 17, 18, 20, 20, 21, 23, 26, 31, 39 have a relatively consistent spread, but 8 is much lower than the rest of the values and is an outlier.

Step5: Analyze fourth dataset

The numbers 63, 65, 66, 69, 71, 78, 80, 81, 82, 82 are in a relatively narrow range with no extreme values.

Answer:

8, 17, 18, 20, 20, 21, 23, 26, 31, 39