Interpreting Residuals from a Line

What does an animal's gestation period have to do with its longevity? Use residuals to determine the prediction errors based upon a least-square regression line. This second lesson plan on residuals shows how to use residuals to create a prediction range for a data point not given. 

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CCSS: Designed
Instructional Ideas

  • Use a projected calculator to display the scatter plot along with the least-squares line for the class to view
  • Determine other animals' gestation time and predict their longevity; research to see if the prediction is accurate within the error band
Classroom Considerations

  • Lesson 15 of a 20-lesson module
Pros

  • Uses actual data but could be adapted to use another set of data
  • Problems make connections to previously learned concepts and keeps them in the forefront
Cons

  • None