Texas Instruments TI-84 PLUS SILV Guidebook - Page 204

R2 is computed and stored for these regression models. QuadReg CubicReg QuartReg The r and r2 that are computed for LnReg, ExpReg, and PwrReg are based on the linearly transformed data. For example, for ExpReg (y=ab^x), r and r2 are computed on ln y=ln a+x(ln b). By default, these values are not displayed with the results of a regression model when you execute it. However, you can set the diagnostics display mode by executing the DiagnosticOn or DiagnosticOff instruction. Each instruction is in the CATALOG (Chapter 15). • To turn diagnostics on or off from the mode screen, select On or Off for StatDiagnostics. The default is Off. • To set DiagnosticOn or DiagnosticOff from the home screen, press y N, and then select the instruction for the mode you want. The instruction is pasted to the home screen. Press Í to set the mode. When DiagnosticOn is set, diagnostics are displayed with the results when you execute a regression model. MathPrint™ Classic When DiagnosticOff is set, diagnostics are not displayed with the results when you execute a regression model. MathPrint™ Classic Chapter 12: Statistics 197