© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
25
WNBA Stats — 2-Variable
Statistics
(
Continued)
7. Now calculate how many points you would
expect a player to score if she plays 35 minutes a
game.
8. Discuss the correlation as a class. Ask students:
•
Are there other factors affecting the players
minutes per game besides points scored?
•
What about defense, rebounding, etc.?
1. Press
u
.
n
Ï
Sx
Î
x
Ð
12.00
2. Press
!
!
to
x
¢
.
x
¢
y
¢
3. Press
<
.
4. Type
35
E
and press
<
.
x
¢
(35)
17.92
Extension
Now have students use the calculator to investigate
the correlation of the other data in the chart such as
the relation of field-goal percentage to minutes per
game, or rebounds per game to minutes per game.
(Remember, since you have already entered the
minutes in
Y
, you only need to enter the new data
in
X
.)
Ask students:
Which 2 variables have the closest correlations?
(That is, which have the correlation coefficient
closest to 1 or 1?)