HP HP-11C

248
Function Key Index
Rs for correcting
accumulations (Page
58).
(:)Computes mean
(average) of x and y
values accumulated
by (=+](Page 60).
[s]Computes sample
standard deviations
of x and y values
accumulated by
(Page 61).
(f.r]Linear Estimate
and Correlation
Coefficient.
Computes estimated
value of y (y) for a
given value of x by
least squares
method and places
result in displayed X-
register. Computes
the correlation
coefficient (r) of the
linear estimate data
by measuring how
closely the data pairs
would, if plotted on a
graph, represent a
straight line, and
places resultin Y-
register (Page 64).
(LR.]JLinear
Regression.
Computes y-
intercept (R) and
slope (A) for linear
functiony =AX + B
that best
approximates x and y
values accumulated
using (X+]. The
value of the y-
intercept is placed in
the X-register; the
value of the slope is
placedinthe Y-
register (Page 63).
Places a
pseudo-random
number in the
displayed X-register;
the pseudo random
sequence is
generated from a
seed stored using
[sTOJ(RAN#](Page
54).
Storage
Store.
Followed by register
address (O through 9,
.0 through .9, [1], or
((i))). stores displayed
number in the
storage register
specified. Also used
to perform storage
register arithmetic
(Page 37).
[RCL]Recall.
Followed by address
(O through 9, .0
through .9, [1], or [(i)],
recalls number from
storage register
specified into the
displayed X-register
(Page 38).
CLEAR [REG]Clears
contents of all
storage registers to
zero (Page 38).
Recalls
number displayed
before the previous
function back into
the displayed X-
register (Page 28).
Trigonometry
[DEG|Sets decimal
degrees mode for
trigonometric
functions—indicated
by absence of GRAD
or RAD annunciator
(Page 45).
(RAD]Sets radians
mode for
trigonometric
functions—indicated
by RAD annunciator
(Page 45).
(GRD]Sets grads
mode for
trigonometric
functions—indicated
by GRAD
annunciator (Page
45).
[SIN), [cos],
Compute sine,
cosine, or tangent,
respectively, of