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Unformatted text preview: c Kendra Kilmer January 30, 2009 Choosing the Best Regression Model • Enter your x and y values into lists. To do this, hit STAT and select 1: Edit... If you have anything in L1 and L2, cursor up to the name of the list, hit CLEAR and ENTER. Now just enter in your values one at a time by pressing ENTER after each number. • From the home screen find the equation of a model by selecting STAT, arrow over to CALC and then select one of the following models (these are the only ones you are responsible for) : 4: LinReg(ax+b) 5: QuadReg 6: CubicReg 7: QuartReg 9: LnReg 0: ExpReg • To automatically insert the model into the Y= button once you have the name of the model on the home screen, press VARS, arrow over to Y-VARS, select 1:Function and then select a name. We need to do this so that we can compare the models graphically. • When finding the equation of each model note the R 2 value. This value is known as the Coefficient of Determination and it is always a number between 0 and 1. The closer to 1 the better the “fit”.Determination and it is always a number between 0 and 1....
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- Fall '08
- Regression Analysis, Retail Value, Kendra Kilmer