Casio STAT 2, Руководство пользователя

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21
u u
u u u
LinearReg
t
Test
LinearReg
t
Test treats paired-variable data sets as (
x
,
y
) pairs and plots all data on a
graph. Next, a straight line (
y
=
a
+
bx
) is drawn through the area where the greatest number
of plots are located and the degree to which a relationship exists is calculated.
b =
#
( x –
o
)( y –
p
)
i =1
n
#
( x –
o
)
2
i =1
n
a =
p –
b
o
t
=
r
n
– 2
1 – r
2
a
: intercept
b
: slope of the line
n
: size of sample (n
>
3)
r
: correlation coefficient
r 2
: c oefficient of determination
Perform the following key operation from the statistical data list.
3 (TEST)
c (T)
d
(LinReg)
The following shows the meaning of each item in the case of list data specification.
$
&
%
............................ p-value test conditions ( “
G
0 ” specifies two-tail test, “ < 0 ”
specifies lower one-tail test, “ > 0 ” specifies upper one-tail
test.)
XList ............................ list for
x
-axis data
YList ............................ list for
y
-axis data
Freq ............................. frequency
Save Res .................... list for storage of calculation results (None or List 1 to 20)
Execute ....................... executes a calculation
After setting all the parameters, align the cursor with [Execute] and then press the function key
shown below to perform the calculation.
•
1
(CALC) ... Performs the calculation.
# You cannot draw a graph for LinearReg
t
Test.