Texas Instruments TITANIUM TI-89 - Manual (Page 121)

Previews 121
5. Move the cursor to row 1 in column 1
(r1c1). Sort the data in ascending order of
population.
This sorts column 1 and then adjusts all
other columns so that they retain the
same order as column 1. This is critical
for maintaining the relationships between
columns of data.
To sort column 1, the cursor can be
anywhere in column 1. This example has
you press
8 C
so that you can see the first four rows.
Press A 8 C 2 ˆ 4
6. Display the Calculate dialog box. Set
Calculation Type = MedMed
x = C1
y = C2
Store RegEQ to = y1(x)
Press ‡ B 7 D C j 1 D j C2 D
B D ¸
7. Perform the calculation to display the
MedMed regression equation.
As specified on the Calculate dialog box,
this equation is stored in y1(x) .
Press ¸
Steps and keystrokes Display