Percentage, Prefix keys, Probability – HP 15c User Manual

Page 267: Stack manipulation, Statistics, Storage

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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).

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