9-6 Statistics
You can enter expressions to define lists in the STAT list editor. For example,
you can now define predicted values and residuals (the differences between the
observed values and the predicted values) for this problem.
21. Press … 1 to display the STAT list editor. Press
~ ~ } to move the cursor onto the name L3.
22. Press y ãY-VARSä 1 to select Y1, and then press £
y ¢ ¤. This defines Lå as the values predicted
by the LINREG line.
23. Press Í to store the values in L3.
24. To store the residuals in L4, press ~ } to move the
cursor onto the name L4. To enter L4 = L2 N L3,
press y £ (the observed) ¹ y ¤ (the
predicted) Í.
25. Press 2 ". Press 1 to select PLOT1. Move
the cursor to OFF, and press Í to turn the plot
off.
26. Press 2 " 2 to select PLOT2. Move the
cursor to ON and press Í to turn the plot on, if
necessary. Press 8 8 Í to define XL as L1.
Press 8 9 9 9 Í to define YL as L4. Press 8
9 Í to set MARK as +.