Texas Instruments TI-30X Teachers Guide - Page 29

WNBA Stats - 2-Variable, Statistics - calculator

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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.? 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?)  1. Press u. n Ï Sx Îx Ð 12.00 2. Press ! ! to x¢. x¢ y¢ 3. Press

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© 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 ²1?)