Correlation
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Lesson Summary:
In this lesson on correlation, you will learn about the relationship between two variables or items and how to predict one based on the other. However, there can be a correlation without a cause-effect relationship, as seen in examples of ice cream sales and drownings, or the number of churches and crime levels in a city. It's important to understand that just because two things are correlated, it doesn't mean one caused the other. So be cautious and don't jump to conclusions.
Lesson Description:
Learn what it means for two variables or items to be correlated. Also, learn about correlation and causation and how two items can be correlated, and yet have no cause and effect relationship.
Additional Resources:
- Correlation on Wikipedia - A link from Wikipedia that does a great job explaining why correlation does not always imply causation.
- Correlation Notes - Notes on the presentation about Correlation.
Questions answered by this video:
- What is correlation?
- How do you measure correlation?
- How do you know if two things are positively correlated or negatively correlated?
- Why would you want to know if two things are correlated?
- Does correlation imply causation?
- If two things are correlated, does that mean one causes the other?
- What are some examples of two things being correlated but not causing each other?
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Staff Review
Very cool video discussing what it means for two things to be correlated, how to show correlation on a graph, and why it is that just because two things are correlated, it does not mean that one caused the other. Good mathematical AND practical use!
