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education/statistics/Correlation and Regression.md
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@ -59,4 +59,11 @@ https://www.thoughtco.com/how-to-calculate-the-correlation-coefficient-3126228
### Ecological Correlations ### Ecological Correlations
- Sometimes each point on the plot represents the average or rate for a whole group of individuals. - Sometimes each point on the plot represents the average or rate for a whole group of individuals.
- Ecological correlations are artificially strong - Ecological correlations are artificially strong
- The size of points may indicate the size of the datapoints - The size of points may indicate the size of the datapoints
# Regression
(Chapter 10, STAT 1040)
## Notes
- Regression uses values of one variable to predict values for a related value.
- The variable you are trying to predict is called the *response variable*. It is graphed along the *y-axis*.
The variable you have information about that you are using to make the prediction is called the *explanatory variable*. It is graphed along the *x-axis*.