Texas Instruments TI-89 Titanium - Page 116

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20. Enter a title for column 4. Define
column 4’s header as the residuals
(difference between observed and
predicted values) for MedMed.
@B C 2 ™ RESID j ¸
j C2 | j C3 ¸
21. Enter a title for column 5. Define
column 5’s header as the values
predicted by the LinReg line.
@B C C 2 ™ LIN j ¸
† Y2 c j C1 d ¸
22. Enter a title for column 6. Define
column 6’s header as the residuals for
LinReg.
@B C 2 ™ RESID j ¸
† j C2 | j C5 ¸
23. Display the Plot Setup screen and
deselect
Plot 1.
Press „ †
24. Highlight
Plot 2 and define it as:
Plot Type = Scatter
Mark = Box
x = C1
y = C4
(MedMed residuals)
@D , D D C j 1 D j C4
¸ ¸
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