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HP -28S Manual Page 268

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~Xy
(Sum of Products of x and
V)
Calculate I,xy, where the x's and y's are corresponding elements of C
1
and C
2
(the columns specified by the first and second parameters in
I,PAR).
Arguments
Program
.
:~:
1 2
I:GET
I
ENTER
I
c:J
~Xy
I
STO
I
Results
1:
~xy
Comments
Begin the program .
Specify C
1
and C
2 .
Extract I,xy.
End the program.
Put the program on the stack.
Store the program as I,XY.
Example. Calculate I,X2, I,Y2, and I,XY for the following statistics
data:
18
12
4
7
3
2
11
1
31
48
20
17
28: Programming Examples
267

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