HP HP-10C - Statistics Functions; Accumulating Statistics

Section 3: Numeric Functions 39
Statistics Functions
Accumulating Statistics
The HP-10C can perform one- or two-variable statistical calculations. The data
are entered into the calculator using the z key, which automatically
calculates and stores statistics of the data in storage registers R
0
through R
5
.
(These registers are therefore referred to as the statistics registers.)
Before beginning to accumulate statistics for a new set of data, you should clear
the statistics registers by pressing ´CLEARQ.
*
In one-variable statistical calculations, to enter each data point—referred to as
an x-value—key the x-value into the display, then press z.
In two-variable statistical calculations, to enter each data pair—referred to as
the x- and y-values;
1. Key the y-value into the display first.
2. Press v.
3. Key the x-value into the display.
4. Press z.
*
This also clears R
6
through R
9
, the stack registers, and the display. However, it will not
clear any of registers R
0
through R
9
that are currently converted to program lines. If the
statistics registers have been converted to program lines, Error 3 will be displayed
when you try to use z. The W function (page 62) can be used to determine
memory status.