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Sharp EL-556G

Sharp EL-556G
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Exponential
regression,
logarithmic
regression,
power
regression,
and
inverse
regression
calcula-
tion:
Statistics
of
O
and
@.
In
addition,
estimate
of
y
for
a
given
x
and
estimate
of
x
for
a
given
y.
(Since
the
calculator
converts
each
formula
into
a
linear
regression
formula
before
actual
calcula-
tion
takes
place,
it
obtains
all
statistics,
except
coefficients
a
and
b,
from
converted
data
rather
than
entered
data.)
Quadratic
regression
calculation:
Statistics
of
@
and
@
and
coefficients
a,
b,
c
in
the
quadratic
regression
formula
(y
=
a
+
bx
+
cx?).
(For
quad-
ratic
regression
calculations,
no
correlation
coef-
ficient
(r)
can
be
obtained.)
When
performing
calculations
using
a,
b
and
c,
only
up
to
one
value
and
eight
instructions
can
be
held.
Xi
Mean
of
samples
(x
data)
SX
Sample
standard
deviation
(xv
data)
@
|
OX
Population
standard
deviation
(x
data)
on
Number
of
samples
xx
|
Sum
of
samples
(x
data)
or
Sum
of
squares
of
samples
(x
data)
—99—

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