Texas Instruments TI-30X - IIS Scientific Calculator Teachers Manual page 28

WNBA Stats — 2-Variable Statistics
r
© 1999 T I I
EXAS NSTRUMENTS NCORPORATED
y = ax + b
TI-30X ÙS: A Guide for Teachers
 1. Press % ‚.
F 0 1 2 3 4 5 6 7 8 9
2. Press .
2
 1. Press u.
n Ï Sx Îx Ð
12.00
2. Press " to .
Ï
n Ï Sx Îx Ð
9.33
3. Press " " " to
Ð
n Ï Sx Îx Ð
21.59
4. Press " " " to Ò x .
Sy Îy Òx
112.00
 1. Press " until you get to a.
This is the slope of the line of
best fit.
ÒXY a b r
1.56
2. Press " to . This is the
b
y-intercept of the line.
Ò XY a b r
7.02
3. Press " to
. This is the
r
correlation coefficient.
ÒXY a b r
0.91
 1. Press " " to
.
y¢
x¢ y¢
2. Press <.
E and press <.
3. Type
15
y¢(15)
30.44
Continued)
(
.
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