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HP HP-67 User Manual

HP HP-67
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Function
Keys
111
4
Sum
of
x
values
from
register
Ry.
5
Sum
of
squares
of
x
values
from
register
Rs.
6
Sum
of
y
values
from
register
Rg.
7
Sum
of
squares
of
y
values
from
register
R;.
8
Sum
of
products
of
x
and
y
values
from
register
Rg.
9
Number
of
entries
(n
=
3).
By
using
the
function
in
conjunction
with
the
key,
you
can
actually
maintain
two
complete
sets
of
products
and
sums
in
your
HP-67.
Mean
The
(mean)
key
is
the
key
you
use
to
calculate
the
mean
(arithmetic
average)
of
data
accumulated
in
secondary
registers
Rgs,
Rge,
and
RSQ
.
When
you
press
[
(3):
1.
The
mean
(X)of
x
is
calculated
using
the
data
accumulated
in
register
Rg,
(2x)
and
Rg,
(n)
according
to
the
formula:
n
i=——1—2
X4
(Thatis,
EM
=5(>
S9
The
resultant
value
for
X
is
seen
in
the
displayed
X-register.
.
The
mean
(y)
of
y
is
calculated
using
the
data
accumulated
in
register
Rgg
(Zy)
and
register
Rgg
(n)
according
to
the
formula:
n
T=—>
v
(Thar
is,
8
=y)
n
=
S9
The
resultant
value
for
y
is
available
in
the
Y-register
of
the
stack
.

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HP HP-67 Specifications

General IconGeneral
BrandHP
ModelHP-67
CategoryCalculator
LanguageEnglish

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