EasyManuals Logo

HP HP-11C User Manual

HP HP-11C
264 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #65 background imageLoading...
Page #65 background image
Section
3:
Numeric
Functions
63
Linear
Regression
Linear
regression
is
a
statistical
method
for
finding
a
straight
line
that
best
fits
a
set
of
two
or
more
data
pairs,
thus
providing
a
relationship
between
two
variables.
After the
statistics
of
a
group
of
data
pairs
has
been
accumulated
in
register
R,
through
Rs,
you
can
calculate
the
coefficients
in
the
linear
equation
y
=
Ax
+
B
using
the
least
squares
method
by
pressing
[f][L.R.].
To
use
the
linear
regression
function
on
your
HP-11C,
use
the
key
to
accumulate
the
statistics
of
a
series
of
two
or
more
data
pairs.
Then
execute
[LR.].
When
you
press
[f][L.R]:
1.
The
contents
of
the
stack
registers
are
lifted
just
as
they
are
when
you
press
[RCL][
X
+],
as
described
on
page
57.
2.
Theslope
(A)
and
the
y-intercept
(B)
of
the
least
squares
line
of
the
data
are
calculated
using
the
equations:
_
n3xy—3x3y
_
Yy3sx?—3x3xy
n3x?—(3x)? n3x?—(3x)?
The
slope
A
is
placed
in
the
Y-register;
the
T
y-intercept,
B,
is
_
7%
p}acec(ii
)l(n
thet
dis-
Y
&
[slope(A)
played
X-register.
X
#
|y-intercept
(B)
Example:
Calculate
the
y-intercept
and
slope
of
Voltz’s
corrected
data.
Solution:
Voltz
could
draw
a
plot
of coal
production
against
electrical
output,
like
the
one
in
the
following
illustration.
However,
with
her
HP-11C,
Voltz
has
only
to
accumulate
the
statistics
(as
we
have
already
done)
using
the
key,
then
press
[LR].

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the HP HP-11C and is the answer not in the manual?

HP HP-11C Specifications

General IconGeneral
BrandHP
ModelHP-11C
CategoryCalculator
LanguageEnglish

Related product manuals