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HP -28S Manual Page 269

Advanced scientific calculator.
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The general steps are as follows.
1. Enter the statistical data.
2. Execute SUMS to create the covariance matrix
~COv.
3. Execute
~X2, ~Y2,
and
~Xy.
4. If
~DAT
contains more than two columns (that is, if each data
point contains more than two variables):
a.
Execute
COL~
to specify new values for C
1
and C
2 .
The
values are stored in
~PAR.
b.
Execute
~X2, ~Y2,
and
~Xy.
Now try the example given above.
Clear the stack, select the STAT menu, and clear
~DAT.
.1
CLEAR
1
.1
STAT
I
ell:
Enter the data and then check that you entered all six data points.
[I]
18,12
%+
I~:
I
[I]
4,7
J+
1:
6
[I]
3,2
J
+ . o . " E B I I I I l D I I l D H m H
[I]
11,1
J+
[I]
31,48
%+
[I]
20,17
%+
HZ
Drop the number of data points.
IDROpl
268
28: Programming Examples

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