HP HP-15C

Function Summary and Index 267
` 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)
(page21).
Statistics
z Accumulates
numbers from X- and
Y-registers into storage
registers R
2
through R
7
(page 49).
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).
Storage
O Store. Stores a
copy of a number into
the storage register
specified {0 to 9, .0 to
.9, V, %} (page
42). Also used for
storage register
arithmetic: new register
contents = old register
contents { +, -,
*, ÷ } display
(page 44).
l Recall. Recalls a
copy of the number
from the storage
register specified {0 to
9, .0 to .9, V, % }
(page 42). Also used
for storage register
arithmetic: new display
= old display {+,
- *, ÷}
register contents (page
44).
CLEAR Q Clears
contents of all storage
registers to zero
(page 43).
K Recalls into
the display the number
present before the
previous operation
(page 35).