Unit 2 Linear Regression Notecards

Here are the "canned statements" to learn for the AP Statistics exam for Unit 2 (Linear Regression0

slope

For every 1 increase in [x], the [y value] is predicted to increase/decrease by _____.

y intercept

When the [x value] is 0, we predict the [y-value] to be _____.

Describe the relationship.

There is a [strong, moderate, weak], [positive, negative], [linear, nonlinear] relationship between [x in context] and [y in context]

r value (correlation coefficient)

There is a [strong, moderate, weak], [positive, negative], [linear, nonlinear] relationship between [x in context] and [y in context]

R² (correlation of determination)

____% of the variation in [y value in context] is explained by its linear relationship with [x value in context].

Standard deviation of residuals (s)

The typical distance between the actual [y values in context] and the predicted [y values in context]

Determine if a point is an outlier.

Since this point is the FARTHEST from the line, it is considered an outlier.

OR

Since this point has the LARGEST residual, it is considered an outlier.