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Casio fx-6200G - Logarithmic Regression

Casio fx-6200G
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M
Linear
regression
Logarithmic
regression
he
regression
formula
is
y=A+
B-inx.
Enter
the
x
data
as
the
logarithm
(In)
Example
Operation
*Relationship
between
temper-
[=]
ature
and
the
length
of
a
steel
bar
(eto)
S215)
(Clears
memory)
Temperature
Length
1060907100309
10°C
1003mm
15909100567
15°C
1005mm
206770101069
20°C
1010mm
256709101169
25°C
1011mm
306]101467
30°C
1014mm
The
data
In
the
above
table
can
be
used
to
obtain
the
terms
of
the
regression
for-
mula
and
the
correlation
coeffi-
cient.
Based
on
the
regression
formula,
the
estimated
length
of
the
steel
bar
at
18°C
and
the
temperature
when
the
bar
is
1000
mm
long
can
be
calcu-
lated.
The
critical
coefficient
(r?)
and
covariance
Lxpr
nex
oF
C2BF2)
can
also
be
calculated.
(Constant
term
A)
Gai
(A}(Ez)
(Regression
coetticient
8)
en)
eg
(Correlation
cositicient
r)
Ban
(T
{Er
(Length
at
18°C)
186M)
Eq
(Temperature
at
1000mm)
1000S
Hea
{Critical
costlicient)
Ga
TE}
Gz)
(Covariance)
OMMMS
we
BREeOOmOes
o1ne
Display
by
x,
and
the
y
data
inputs
the
same
as
that
for
linear
regression.
‘estimated
values
2,
and
9
based
on
the
regression
formula
can
be
calculated
using
the
following
formulas:
k
S=A+Beinx
ran)
‘The
same
operation
as
with
linear
regression
can
be
used
to
obtain
the
regres-
5sion
coefficient
and
for
making
corrections.
To
obtain
the
estimated
value
9,
2037)
x
fi)
(3)
G9
is
used,
and
to
obtain
estimated
value
£,
y
bi
a5used.
EGE
Ibs
is
Furthermore,
Dx,
Dx?
and
Lxy
are
obtained
by
Linx,
L(inx}?,
and
Linx-y
«espectively.
997.4
‘
Example
Operation
Display
0.5€
0.9826073685
cael
woor.ae
29
8S
74
029
1.667)
3.36729583
{
4.64285714;
495
0.9655172414
118
the
data
in
the
above
table
jan
be
used
to
obtain
the
35yms
of
the
regression
for-
ia
and
the
correlation
coeffi-
lent.
Based
on
the
regression
mula,
estimated
value
9
can
obtained
for
xi=
80,
and
“Erroneous
data
clearing/correction
(correct
data
operation:
10@#)(7)10036%)stimated
value
can
be
@If
11
GG)
1003
is
entered,
enter
correct
data
after
pressing
tained
for
yi=
73.
@It
11@#@)
100307
is
entered,
enter
correct
data
after
pressing
GD.
@if
11
GHC)
1003
(G7)
was
entered
previously,
enter
correct
data
after
pressing
11GN)G}
1003).
—66—-
é
4
t
()508()23.56)
74
G]F38.007
(2)
1030)46.4e0
2)
1188G48.90)
{Constant
term
A)
Sea
(Regression
coetlicient
8)
Soles
(Correlation
coetficient
r)
U
when
x/=
80)
(9)
80.
{0
a)
(sai
ba] co)
{4
when
yiw
73)
BMD
his
3.912023005
4.304065093
4.634728988
4.770684624
~111,1283976
34.02014749
9.9940139464
37.94879482
224.1541314
}
|
i
~67~—

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