Casio fx-3800P - Logarithmic and Exponential Regression

*
Correction
of
data
entry
Ex.)
OPERATION
READ-OUT
—_——S
a
READ-OUT
“LR”
2
B93
A
®
(Mistake)
4
(To
correct)
3
4 bia)
3
Box)
2 Ger
4
ban)
@)
(Mistake)
1
5
(cara)
3
(e.79
5
(ara)
2
Gor
4 wn
A
og
6
oan)
(SHIFT)
(0€
4
95
Gn)
@'
(To
correct)
2
G59
4
GAH
fa)
2
Go.¥4
5
(ata)
@
(Mistake)
@
(To
correct)
)'
(To
correct)
(@)
(Mistake)
©
(Mistake)
(5)
(To
correct)
These
ways
of
correction
can
also
be
applied
to
logarithmic,
exponential
or
power
regression.
#
Logarithmic
regression
Formula:
Y=A+Belnx
*
Input
data
items
are
the
logarithm
of
x
(Inx),
and
y
which
is
the
same
as
in
linear
regression,
*
Operation
for
calculating
and
correcting
regression
coefficients
are
basically
the
same
as
in
linear
regression.
Operate
the
sequence
x
(HFT)
in)
B}
to
obtain
estimator
¥
and
y
(SHIET)
(2)
SH}
for
estimator
¥.
Note
that
ZInx,
E(Inx)?,
and
Zlnx+y
are
obtained
instead
of
Ex,
Ux”,
and
Exy
respectively.
Ex.)
Find
A,
B,
r,¥
and
¥
using
the
above
figures
as
a
basis.
OPERATION
READ-OUT
“LR”
CH
5
29H)
|
3.36729583
1036
50
GHA
te)
33
23075
0)
74
GH
(in)
A
38
Ge)
103
GH
(in)
59
46014
ba
11
8
SHED
(in)
G79]
48)
9
OM)
SHIFT)
(A)
(A)
(B)
(r)
34.02014743
0.994013945
(When
xi
is
80)
SOMA
|37.94879479
(y)
(When
yi
is
73)
736H@EMMe
|224.1541318
(x)
"Exponential
regression
Formula:
sy
=
Ave
8x
*Input
data
items
are
the
logarithm
of
y
(Iny)
and
x
which
is
the
same
as
in
linear
regression.
*Operation
for
correction
is
basically
the
same
as
in
linear
regression.
Operate
(SHIFT)
(A)
GHEE}
to
obtain
coefficient
A,
x
for
estimator
Y,
and
y
GF
(nm)
GF)
for
estimator
¥.
Note
that
ZIny,
=
(iny)?,
and
=x-Iny
are
obtained
instead
of
Ly,
Ly?,
and
&xyp.
129
|
198
|
267
15.7
12.1
8.5
Find
A,
B,r,
X
and
J
using
the
above
figures
as
a
basis,
Ex.)