User manual

© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X ÙS: A Guide for Teachers
23
Overview
Students use WNBA statistics to explore the
relationship between 2 variables. They use the
TI-30X
Ù
S to compute the regression equation and
evaluate some values.
Math Concepts
•
2-variable
statistics
Materials
• TI-30X ÙS
• pencils
• student activity
Activity
Present the following problem to students:
Do you think WNBA (Women’s National Basketball
Association) playing time (in minutes per game)
is related to how many points a player scores? Do
you think it is related to how many rebounds a
player gets? Or is it related to the player’s field goal
percentage?
Procedure
1. Put the calculator in
STAT
mode and choose
2-VAR
statistics.
 1. Press % t and then
".
1-VAR 2-VAR
2. Press < to select
2
-
VAR
.
2. Using the table in the activity (page 26), enter the
data. Enter points per game as the
X
-variable and
minutes per game (playing time) as the
Y
-variable.
 1. Press v.
X1=
2. Enter
10.1
(points per
game for the first player,
Rhonda Mapp).
X1=10.1
3. Press $.
Y1=1
4. Enter
21.7
(minutes per
game for Rhonda Mapp).
Y1=21.7
5. Press $ and enter data
for the second player.
6. Enter data for each player
in the table. Press $ after
entering each data point.
`
WNBA Stats — 2-Variable Statistics