LSRL

ap stat

slope interpretations

For every one unit change of x, there is a PREDICTED “b” unit inc/dec in y.

interpretation of y^ and x

Where y^is the predicted electricity production in amperes for one windmill and x represents the observed wind velocity in mph for one windmill.

Residual formula

Residual = actual - predicted

What does r² do?

Explains how much variation y is explained by x. 87.3% of the variation in electricity production can be explained by the variation in wind velocity.

About 10.4% of the variability in number of deaths per 100,000 people is accounted for by the linear model relating deaths to annual consumption of cigarettes per person.

S = 0.237, stand dev. of residuals?

The typical electricity prod. varies from the predicted electricity prod by 0.237 amperes.