ap stats unit 2 sentence frames

interpreting residuals (positive)

The actual (response variable) is greater than predicted by (residual units)

interpreting residuals (negative)

The actual (response variable) is less than predicted by (residual units)

interpreting s

When using the LSRL with (explanatory variable) to predict (response variable), we will typically be off by (value of s with units of response variable y)

interpreting r²

r²% of the variation in (response variable) can be explained by the linear relationship with (explanatory variable)

CDOFS

context, direction, outliers/clusters, form, strength

interpreting slope

for every 1 (unit) increase in (explanatory variable), our model predicts an average increase/decrease of (slope) in (response variable)

interpreting y-intercept

When the (explanatory variable) is zero (units), our model predicts that the (response variable) would be (y-intercept)

high leverage/not an outlier

changed slope/y-intercept

low leverage/outlier

lowered r

high leverage/outlier

changed slope/y-intercept/lowered r