Question

If the outlier is excluded from the following data set, what happens to the mean?

110, 112, 109, 112, 21, 108, 110, 111, 108


A . It decreases.

B . It increases.

C . It does not change.

D . It depends whether the outlier is a high outlier or a low outlier.

Answer 1

B, It increases.

Explanation:

Answer 2

With the outlier, the average is 100.1

Without it, the average is 110.

So without the outlier, the mean increases.

Explanation:

The outlier is 21. Think about it in terms of grades. If your lowest grade is taken off your report card, your average would increase