Correlation Vs. Causation

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Presentation transcript:

Correlation Vs. Causation

Correlation DOES NOT imply causation!!!

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.

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

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

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