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What do you do for correlation?
Pick 2 variables, measures, and see if they relate
Positive correlation
variables co-vary in the same direction, moves up and up, down and down
negative correlation
variables co-vary in the opposite direction
correlation coefficient
helps us find out how close to things vary (+1, -1)
Correlation does not =?
causation
illusory correlation
sometimes we see correlation when there aren't any, sometimes things are so odd we try to relate them
predisposition
more likely to have/do something