TI-83 Plus Statistics 323
23. Press q 9 to select 9:ZoomStat from the
ZOOM menu. The window variables are
adjusted automatically, and the original scatter
plot of time-versus-length data (plot 1) is
displayed.
24. Press … ~ ƒ [A] to select A:PwrReg
from the STAT CALC menu. PwrReg is pasted to
the home screen.
Press y d ¢ y e ¢. Press ~ 1 to
display the VARS Y.VARS FUNCTION secondary
menu, and then press 1 to select 1:Y1. L1, L2,
and Y1 are pasted to the home screen as
arguments to PwrReg.
25. Press Í to calculate the power regression.
Values for a and b are displayed on the home
screen. The power regression equation is
stored in Y1. Residuals are calculated and
stored automatically in the list name RESID.