USING THE CALCULATOR 3.2 Residuals and the Least-Squares Regression Line

Using the Calculator – TI Series – p. 146 TeamAverage Points Per Game Wins Alabama Arkansas Auburn25.78 Florida25.57 Georgia Kentucky15.85 Louisiana State Mississippi16.12 Mississippi State25.37 South Carolina Tennessee20.35 Vanderbilt26.76 STAT  Edit Enter data. x-variable in L1 y-variable in L2

Using the Calculator – TI Series – p. 146 STAT PLOT  CALC ↓ 8: LinReg(a+bx) Press Enter L1: 2 nd, press 1 L2: 2 nd, press 2 Y1: VARS  Y-VARS ↓ 1: Function, Select 1: Y1

Using the Calculator – TI Series – p. 146 Press Enter Press Y= Make sure Plot 1 is On with L1 & L2 for the x- and y-list

Using the Calculator – TI Series – p. 146 Zoom 9 to graph Press Trace. Going ← and → will help you jump from point to point Going ↑ and ↓ helps you jump from the points to the line

Using the Calculator – TI Series – p. 146 Press 2 nd List (STAT button) Select 7:RESID Go to STAT PLOT Go to Ylist To get the residual plot: *Note: You must have completed the previous steps for this to work.

Using the Calculator – TI Series – p. 146 Zoom 9 to graph To get the residual plot:

Using the Calculator – HP Prime – p. 146 TeamAverage Points Per Game Wins Alabama Arkansas Auburn25.78 Florida25.57 Georgia Kentucky15.85 Louisiana State Mississippi16.12 Mississippi State25.37 South Carolina Tennessee20.35 Vanderbilt26.76 Enter data x-variable in C1 y-variable in C2

Using the Calculator – HP Prime – p. 146 Press Plot Press Menu, then Fit to get the line Press Symb First box is x-variable (C1), Second box is y-variable (C2) Make sure it says linear Fit 1 should have M*X+B

Using the Calculator – HP Prime – p. 146 Go back go SYMB Check out the equation ***NOTE: We would switch the equation around to be a + bx.

Using the Calculator – HP Prime – p. 146 Go to the Home Screen Press the toolbox Select App on the screen, go ↑ to Statistics 2Var → to 3 Resid Press Enter To get residual plot: Type S1 (for Scatterplot 1), Sto► (bottom right corner of screen), then C3 Press Enter

Using the Calculator – HP Prime – p. 146 Go to Numerical View Residuals are listed in C3 To get residual plot: Go to Symbolic View Uncheck S1 Use S2 with C1 as the x and C3 as the y

Using the Calculator – HP Prime – p. 146 Press Plot Press Menu (soft key on screen) and scroll to autoscale for better view To get residual plot: