C

AP STATS UNIT 3 STEMS

Interpret Slope Value:

  • For Every 1 unit increase in explanatory variable, our model predicts an average increase/decrease of slope in response variable.

Interpret Y-Intercept:

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

Interpret S (Typical Residual Length):

  • When using the LSRL with explanatory variable to predict response variable, we will typically be off by about value of S with units of the response variable.

Interpreting r² (Coefficient of Determination):

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

(Not used as much but useful):

Interpret the Model’s Residual (Prediction Error):

  • The actual response variable is greater/less than predicted by residual units.