Texas Instruments TI Programmable 57 User Manual

LINEAR REGRESSION
DESTINATION
We'll
develop
a
program
that
allows
you
to
enter
all
of
your
data
points
easily,
and
then
compute
m,
b,
and
r’.
Then
you'll
want
to
be
able
to
compute
a
“y”
value
for
any
given
x"
value,
or
for
any
given
y
to
finda
corresponding
"x"
value.
To
do
all
of
this
you'll
follow
these
steps:
*
Enter
data
points
by
entering
x,
pressing
[i]
,
then
entering
y
and
pressing
.
You'll
do
this
until:all
of
your
(x,
y)
data
points
are
entered.
- Then to find m, press 0.
+ To find b, press I
* To find r, press 2. Then to find r.
(Remember a "r’’ value near one means good correlation, a value near
zero
means
that
the
calculator
could
not
reliably
correlate
your
data
to a straight line.)
*
To
predict
what
value
on
the
line
that
y
will
have
for
a
given
"x"
value, just enter the x’ value and press 3.
*
To
predict
what
value
on
the
line
that
x
will
have
for
a
particular
y,
enter
the
‘y' value
and
press
[Sal
4,
PLANNING THE Route
The
first
step
will
be
to
enter
all
the
data
points
using
the
special
data
collection
keys
on
your
calculator.
These
are
the
[nd]
Eg,
,and
keys
on
the
lower
right
of the
machine,
described
at
the
end of
Chapter
2.
Rather
than
pushing
[nd]
for
each
entry,
we'll
include
a
simple
sequence
in the
program
to
help
in
entering
data points.
Then
we'll
divide
the
rest
of the
program
into
five
subroutines
to
calculate
m,
b, r,
and
to
find
x
or
y.
Follow
the
flow
chart
carefully
as
steps
have
been
conserved
using
memory
arithmetic.
Maxine Tracks
Key
in
the
flow
chart
carefully
from
the
Making
Tracks
chart
on
the
next
page.

Texas Instruments TI Programmable 57 Specifications

General

Brand	Texas Instruments
Model	TI Programmable 57
Category	Calculator
Language	English