Question

What will happen to the mean if the outlier is removed?

4, 5, 5, 7, 9, 17

It will not change.
It will be the same as the median.
It will decrease.
It will increase.

Answer 1

The mean is the average. The outlier is a number way bigger or smaller than the rest of the data. The outlier here would be 17. If you remove 17 and then find the average again, it will be smaller because all the numbers left are around the same range.

Answer: It will decrease