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11–12 Statistical Operations
Statistics Registers
Register Number Description
n 28 Number of accumulated data pairs.
Σ
x 29 Sum of accumulated x–values.
Σ
y 30 Sum of accumulated y–values.
Σ
x
2
31 Sum of squares of accumulated x–values.
Σ
y
2
32 Sum of squares of accumulated y–values.
Σ
xy 33 Sum of products of accumulated x– and
y–values.
You can load a statistics register with a summation by storing the number (28
through 33) of the register you want in i (number
I
) and then storing the
summation (value
I
). Similarly, you can press
|
to view a
register value — the display is labeled with the register name. The SUMS menu
contains functions for recalling the register values. See "Indirectly Addressing
Variables and Labels" in chapter 13 for more information.