1. The Science of Predicting Outcome
Linear Regression
The Science of Predicting Outcome

2. r2 :coefficient of determination
Is the fraction of the variation in the values of y that is explained by the least-squares regression of y on x
a=.0987
b=2.3234
r2=.40997
r=.6502
40% of the variation in y is explained by the least-square regression of y on x

3. Your Turn
Interpret the coefficient of determination generated by this computer output.
80% of the variation in the predicted BAC is explained by the least-square regression of BAC on number of beers consumed.