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9-6 Statistics
You can enter expressions to define lists in the STAT list editor. For example,
you can now define predicted values and residuals (the differences between the
observed values and the predicted values) for this problem.
21. Press
1
to display the
STAT
list editor. Press
~
~
}
to move the cursor onto the name
L3
.
22. Press
y
ã
Y-VARS
ä
1
to select
Y1
, and then press
£
y
¢
¤
. This defines
L
å
as the values predicted
by the
LINREG
line.
23. Press
Í
to store the values in
L3
.
24. To store the residuals in
L4
, press
~
}
to move the
cursor onto the name
L4
. To enter
L4 = L2
N
L3
,
press
y
£
(the observed)
¹
y
¤
(the
predicted)
Í
.
25. Press
2
"
. Press
1
to select
PLOT1
. Move
the cursor to
OFF
, and press
Í
to turn the plot
off.
26. Press
2
"
2
to select
PLOT2.
Move the
cursor to
ON
and press
Í
to turn the plot on, if
necessary. Press
8
8
Í
to define
XL
as
L1
.
Press
8
9
9
9
Í
to define
YL
as
L4
. Press
8
9
Í
to set
MARK
as
+
.
132


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