Students will be asked to use the "Wildfire deaths" data to determine a linear model. They will examine the effect an outlier has on the model and compare methods to determine the best model.
Before the Activity
If you are using the TI-Navigator™ System with the TI-73 Explorer™ you will need the attached .pdf file.
See the attached Teacher Edition PDF file for notes and guidelines for this activity. The Technology Guide PDF file includes step-by-step calculator instructions with screen shots.
If you are using the TI-Navigator™ Classroom Learning System, see the TI-Navigator Basic Skills Guide PDF file for information on how the system can be integrated into your activity.
During the Activity
Create a scatter plot.
Determine a linear equation using linear regression both with and without the outlier on the calculator.
Determine a linear equation using median-median both with and without the outlier on the calculator.
Compare the two sets of lines and determine which method is better when there is an outlier in the data set.
Distribute the Student Edition PDF file to your class.
Follow the activity procedures outlined in the student document.
You may use the Transparency PDF file to display a large image of the USA TODAY® graphic during the activity.
After the Activity
Distribute the assessment questions or send the attached LearningCheck™ assessment to your class to gauge student understanding of the concepts presented in the activity.