Question

The scatterplot below shows a set of data points.

Which point would be considered an outlier?

(1, 5)
(3, 9)
(5, 4)
(9, 1)

Answer 1

(3,9) is the outlier since it is the farthest away from the other points.

Answer 2

Explanation:

Definition of an outlier:

A value that "lies outside" (is much smaller or larger than) most of the other values in a set of data.

Here in the scatter plot we can see that

(3,9) deviates from other values very much.

Outlier An extreme value in a set of data which is much higher or lower than the other numbers. Outliers are to be removed to get accurate results since they have the power to affect the mean value of the data but have little effect on the median or mode of a given set of data.

That is why when outliers are present mean or mode is the better mode to measure central tendency.