Texas Instruments TI-84 PLUS Guidebook - Page 187
Xlist, Store ReqEQ, Calculate, LinRegax+b, RESID, LIST NAMES, to view the home
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11. Fill in each argument in the stat wizard displayed. Press y d (for Xlist:), and † y e (for Ylist:), Press † † (to Store ReqEQ:)and then press t a Í to paste Y1. Press † (to select Calculate). 12. Press Í to execute LinReg(ax+b). The linear regression for the data in L1 and L2 is calculated. Values for a and b are displayed in a temporary result screen. The linear regression equation is stored in Y1. Residuals are calculated and stored automatically in the list name RESID, which becomes an item on the LIST NAMES menu. Note: - You can control the number of decimal places displayed by changing the decimal mode setting. - The statistics reported are not stored in the history on the home screen. - Press 5 ~ ~ ~ to access the statistical variables. - Press ' to return to the home screen. 13. The stat wizard pastes the populated command in the home screen history for repeated use, if needed (press ' } } to view the home screen history as show in the screen). 14. Press s. The regression line and the scatter plot are displayed. The regression line appears to fit the central portion of the scatter plot well. However, a residual plot may provide more information about this fit. 15. Press ... 1 to select 1:Edit. The stat list editor is displayed. Press ~ and } to move the cursor onto L3. Press y 6. An unnamed column is displayed in column 3; L3, L4, L5, and L6 shift right one column. The Name= prompt is displayed in the entry line, and alpha-lock is on. Chapter 12: Statistics 180