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Function Key Index 205
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 205 of 209
Printered Date: 2005/7/29 Dimension: 14.8 cm x 21 cm
Ö Computes mean
(average) of x-values and
y-values using
accumulated statistics
(page 77).
Computes weighted
average of y-(item) and
x-(weight) values using
accumulated statistics
(page 81).
v Computes sample
standard deviations of x-
and y-values using
accumulated statistics
(page 79).
R Linear estimate
(X-register), correlation
coefficient (Y-register).
Fits a line to a set of (x,y)
data pairs entered using
_, then extrapolates this
line to estimate a y-value
for a given x-value. Also
computes strength of
linear relationship (r)
among that set of (x, y)
data pairs (page 80).
Q Linear estimate
(X-register), correlation
coefficient (Y-register).
Fits a line to a set of (x,
y) data pairs entered
using _, then
extra-polates this line to
estimate an x-value for a
given y-value. Also
computes strength of
linear relationship (r)
among that set of (x,y)
data pairs (page 80).
Mathematics
r Computes square root
of number in displayed
X-register (page 83).
q Raises number in
Y-register to power of
number in X-register
(page 85).
y Computes reciprocal
of number in displayed
X-register (page 83).
e Computes factorial
[n•(n–1)... 3•2•1] of
number in displayed
X-register (page 83).
> Natural antilogarithm.
Raises e (approximately
2.718281828) to power
of number in displayed
X-register (page 83).
¿ Computes natural
logarithm (base e) of
number in displayed
X-register (page 83).
Number Alteration
B Rounds mantissa of
10digit number in
X-register to match the
display (page 83).
Ñ Leaves only the
integer portion of
number in displayed
X-register by truncating
fractional portion
(page 83).
T Leaves only the
fractional portion of
number in displayed
X-register by truncating
integer portion
(page 84).
Stack Rearrangement
~ Exchanges contents
of X and Y-registers of
stack (pages 74 and
172).
d RolIs down contents
of stack for viewing in
displayed X-register
(page 172).
F Recalls number
displayed before the
previous operation back
into the displayed
X-register (pages 74
and 176).