Casio CFX-9850GB PLUS, User Manual

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20070201
u
LinearReg
t
Test
LinearReg t Test treats paired-variable data sets as (
x
,
y
) pairs, and uses the method
of least squares to determine the most appropriate
a
,
b
coeffi cients of the data for the
regression formula
y
=
a
+
bx
. It also determines the correlation coeffi cient and
t
value, and
calculates the extent of the relationship between
x
and
y
.
a
: intercept
b
: slope of the line
n
: size of sample (
n
>
3)
r
: correlation coeffi cient
r
2
: coeffi cient of
determination
Perform the following key operations from the statistical data list.
3
(TEST)
2
(t)
3
(REG)
The following shows the meaning of each item in the case of list data specifi cation.
β
&
ρ
............................ p-value test conditions (“
G
0” specifi es two-tail test, “< 0”
specifi es lower one-tail test, “> 0” specifi es upper one-tail
test.)
XList ............................. list for
x
-axis data (List 1 to 26)
YList ............................. list for
y
-axis data (List 1 to 26)
Freq .............................. frequency (1 or List 1 to 26)
Save Res ...................... list for storage of calculation results (None or List 1 to 26)
Execute ........................ executes a calculation
After setting all the parameters, use c to move the highlighting to “Execute” and then press
the function key shown below to perform the calculation.
•
1
(CALC) ... Performs the calculation.
b =
Σ
(
x
–
o
)(
y
–
p
)
i =1
n
Σ
( x –
o
)
2
i =1
n
a =
p
– b
o
t = r
n – 2
1 –
r
2
b =
Σ
(
x
–
o
)(
y
–
p
)
i =1
n
Σ
( x –
o
)
2
i =1
n
a =
p
– b
o
t = r
n – 2
1 –
r
2
# You cannot draw a graph for LinearReg
t
Test.
6-5-16
Tests