HP 33s User Manual page 156

Register
n
x
y
2
x
2
y
xy
You can load a statistics register with a summation by storing the number (28
through 33) of the register you want in i ( number
e Ò
summation ( value
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.
11–12
Statistical Operations
Statistics Registers
Number
28 Number of accumulated data pairs.
29 Sum of accumulated x –values.
30 Sum of accumulated y –values.
31 Sum of squares of accumulated x –values.
32 Sum of squares of accumulated y –values.
33 Sum of products of accumulated x – and
y –values.
). Similarly, you can press
Description
e Ñ
) and then storing the
º È Ò
to view a