Texas Instruments TI-30X Teachers Guide - Page 27

WNBA Stats - 2-Variable Statistics - calculator how to use variables

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WNBA Stats - 2-Variable Statistics Overview Students use WNBA statistics to explore the relationship between 2 variables. They use the TI-30X ÙS 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. 2. Using the table in the activity, enter the data. Enter points per game as the X-variable and minutes per game (playing time) as the Y-variable.  1. Press % t and then ". 1-VAR 2-VAR 2. Press < to select 2-VAR.  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 $ to enter data for the second player. 6. Enter data for each player in the table. Press $ after entering each data point. © 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers 23

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© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
23
WNBA Stats — 2-Variable Statistics
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
Ù
S
• 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, 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
$
to enter data for
the second player.
6.
Enter data for each player
in the table. Press
$
after
entering each data point.