### Learn math, science, English SAT & ACT from

high-quaility study
videos by expert teachers

##### Thank you for watching the preview.

To unlock all 5,300 videos, start your free trial.

# Analyzing Data - Problem 3

###### Carl Horowitz

###### Carl Horowitz

**University of Michigan**

Runs his own tutoring company

Carl taught upper-level math in several schools and currently runs his own tutoring company. He bets that no one can beat his love for intensive outdoor activities!

The outlier when you’re dealing with data, is typically the piece of information that doesn’t really fit the standards of everything else. And in an experiment, it can be a sign that something didn’t go right, and in a test it would be the person who destroyed the curve for everybody else. It’s basically the one piece of data that sort of doesn’t fit in the normal distribution of everything else.

To find it, what we do is, we first want to arrange our data in some sort of order, typically smallest to largest. I’m going to rearrange these numbers, so we have 50, 56, 56, 65, 71 and then 87. Once you have your numbers arranged logically, just look at the difference between each number. So the 50 and 56 we have a difference of 6, 56 to 56, obviously that’s a difference of nothing, 56 to 65 is 9, 65 to 71 is 6 and then 71 to 87 is 16.

The outlier is going to be the one that sort of doesn’t fit in. Here we have some decent size gaps, but everything is a gap less than 10, short of this last little jump which went up 16. In this case, the outlier is the one that doesn’t fit, that mould which is going to be the 87 on the end.

Just line them up in ascending order, and to find the outlier just look for large gaps. Typically it’s going to occur at the high end or the low end.

Please enter your name.

Are you sure you want to delete this comment?

###### Carl Horowitz

B.S. in Mathematics University of Michigan

He knows how to make difficult math concepts easy for everyone to understand. He speaks at a steady pace and his step-by-step explanations are easy to follow.

##### Concept (1)

##### Sample Problems (3)

Need help with a problem?

Watch expert teachers solve similar problems.

## Comments (0)

Please Sign in or Sign up to add your comment.

## ·

Delete