HP 15c Collector's Edition User Manual

Function Summary and Index 277
(For matrix use, refer to
Matrix Functions keys,
page 276.)
p Permutation.
Computes the number of
possible different
arrangements of y
different items taken x
at a time, and causes the
stack to drop (page 47).
(For matrix use, refer to
Matrix Functions keys,
page 276.)
Stack Manipulation
® Exchanges
contents of X- and Y-
stack registers
(page 34).
X X-register
exchange. Exchanges
contents of X-register
with those of any other
named storage register.
Used with V, %, digit,
or . digit address
(page 42).
} Real exchange
imaginary. Exchanges
the contents of the real
and imaginary X-
registers and activates
Complex mode
(page 124).
) Rolls down contents
of stack (page 34).
( Rolls up contents of
stack (page 34).
` Clears contents of
display (X-register) to
zero (page 21).
− In Run mode:
removes the last digit
keyed in, or clears the
display (if digit entry has
been terminated)
(page 21).
Statistics
z Accumulates
numbers from X- and Y-
registers into storage
registers R
2
through R
7
(page 49).
l z Copies Σy
from R
3
and Σx from R
5
into the X-register and
the Y-register,
respectively (page 50).
w Removes numbers in
X- and Y-registers from
storage registers R
2
through R
7
for correcting
z accumulations
(page 52).
’ Computes mean of
x- and y-values
accumulated by z
(page 53).
S Computes sample
standard deviations of x-
and y-values
accumulated by z
(page 53).
j Linear estimate and
correlation coefficient.
Computes estimated
value of y (ŷ) for a given
value of x by least
squares method and
places result in X-
register. Computes the
correlation coefficient, r,
of the accumulated data
and places result in Y-
register (page 55).
L Linear Regression.
Computes the y-
intercept and slope for
the linear function best
approximating the
accumulated data. The
value of the y-intercept
is placed in the X-
register; the value of the
slope is placed in the Y-
register (page 54).
# Random number.
Yields a pseudorandom
number as generated
from a seed stored using
O # (page 48).
CLEAR ∑ Clears
contents of the statistics
registers (R
2
to R
7
)
(page 49).

HP 15c Collector's Edition Specifications

General

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