HP 15c Collector's Edition User Manual

Section 4: Statistics Functions 49
Keystrokes Display
.5764
0.5764
Stores 0.5764 as random number
seed. (The ´ keystroke may be
omitted.)
O ´ #
0.5764
´ #
0.3422
Random number sequence
initiated by the above seed.
´ #
0.2809
−
0.0000
l ´ #
0.2809
Recalls last random number
generated, which is the new seed.
(The ´ may be omitted.)
Accumulating Statistics
The HP 15c performs one- and two-variable statistical calculations. The
data is first entered into the Y- and X-registers. Then the z function
automatically calculates and stores statistics of the data in storage
registers R
2
through R
7
. These registers are therefore referred to as the
statistics registers.
Before beginning to accumulate statistics for a new set of data, press
´ CLEAR ∑ to clear the statistics registers and stack. LAST X is not
cleared. (If you have reallocated registers in memory and any of the
statistics registers no longer exist, Error 3 will be displayed when you try
to use CLEAR ∑, z, or w. Appendix C explains how to reallocate
memory.)
In one-variable statistical calculations, enter each data point (x-value) by
keying in x and then press z.
In two-variable statistical calculations, enter each data pair (the x- and y-
values) as follows:
1. Key y into the display first.
2. Press v. The displayed y-value is copied into the Y-register.
3. Key x into the display.
4. Press z. The current number of accumulated data points, n, will
be displayed. The x-value is saved in the LAST X register and y
remains in the Y-register. z disables stack lift, so the stack will
not lift when the next number is keyed in.

HP 15c Collector's Edition Specifications

General

Brand	HP
Model	15c Collector's Edition
Category	Calculator
Language	English