Lyric © 2015 Lawrence M. Lesser; Music by Dominic Dousa
Before you do regression,
Check out the scatterplot
Make sure a linear relationship
Is good for what you've got!
We try to predict weight
Using height as the predictor
If the correlation is really strong,
We will be a victor!
For a unit increase of height
The expected weight will go
Up by five units:
That's the meaning of the slope!
If r equals 0.9
then 0.81 is r square:
The part of variation
In Y that X does share!
X and Y
Have a relationship
And our well-fit line
Gives us a good model to predict!