1. Correlation Vs. Causation

2. Correlation DOES NOT imply causation!!!

3. Causation Example
There were 10 homework assignments in the chapter. The graph shows the number of assignments each student in the class completed compared to his/her chapter test score.

4. No Causation Example
The following scatterplot compares a student’s height to the number of siblings he/she has.

5. Lurking Variables
Lurking Variable: A variable that is not the independent variable or the dependent variable but affects correlation

6. Facebook Users Get Lower Grades in College
Lurking Variables
Newspaper Headline:
Facebook Users Get Lower Grades in College