Question

Please Help!!
When the outliers are removed, how does the mean change?

Answer 1

Here are the choices:

The mean remains the same.

The mean decreases by 2.

The mean increases by 2.

There are no outliers.

Answer 2

each outlier is about 10 units from the mean, one higher one lower, so the mean is unchanged when they are removed

Answer 3

So is it A?

Answer 4

The mean is the sum of the values divided by how many values there are. When you remove outliers, you often change the mean. Here, the mean is about 25 and the outliers are 10 above and 10 below, so they cancel out, leaving the mean the same.