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14
TI36XSUS.DOC MURFE pruning--US version Pat Hatcher
Revised: 06/17/99 4:37 PM Printed: 06/17/99 4:37 PM
Page 14 of 29
For trend-line analysis, enter 1st data point, and then
enter just
y
values with
4
.
x
is automatically
incremented by 1.
Linear Regression Example
Predict
y
for
x
= 9, given (4,5), (4,5), (9,9), (2,3).
Calculate correlation coefficient, slope, and intercept of
the line, mean of
x
values, and mean of
y
values.
"
STAT
0.
(
[
STAT
0.
4
.
5
(
\
2
4
STAT
2.
9
.
9
4
STAT
3.
2
.
3
4
STAT
4.
9
(
q
(predict
y
for
x
=9)
STAT
9.074766355
"
œ
(correlation coefficient)
STAT
0.998030525
(
o
(slope)
STAT
0.841121495
(
n
(intercept)
STAT
1.504672897
(
]
(mean of
x
values)
STAT
4.75
(
c
(mean of
x
values)
STAT
5.5