HP HP-28S - Page 269

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."EBIIIIlDIIlDHmH
[I] 11,1 J+
[I] 31,48 %+
[I] 20,17 %+
HZ
Drop the number of data points.
IDROpl
268 28: Programming Examples