# What is the standard deviation of {11, 23, 3, 1, 500, 27, 18, 14, 2}?

##### 1 Answer

Dec 4, 2015

#### Explanation:

The 500 is spurious data (Does not look like it is meant to be part of the data set). This will drastically effect the mean value. The standard deviation equations (There is a set of them) are derived from

Sometimes

They will be expecting you to include the 500. By the way, if you are testing the whole population you use

Using