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This is " Outliers " from our Understanding Data course. Did you have a classmate in school that was head and shoulders above the other students? That kid was an

This is "Outliers" from our *Understanding Data* course.

Did you have a classmate in school that was head and shoulders above the other students? That kid was an outlier.

Outliers fall outside of the pattern that we’re used to seeing. And when it comes to data sets, they can throw a major kink into our analysis.

Let’s return to our example of professor evaluations and beauty scores. The relationship that we’ve observed between the two variables is that better looking professors receive higher evaluations.

But what if a good looking professor received a very low evaluation score? How would that affect our analysis?

In this video, Professor Stratmann will show you how much an outlier can affect a regression line – and you’ll have the chance to play with data on your own using DataSplash.