25
k
k
k
k
k
2-Sample
F
Test
2-Sample
F
Test
tests the hypothesis for the ratio of sample variances. The
F
Test is
applied to
F
distribution.
F
=
x
1
n
–
1
2
"
x
2
n
–
1
2
"
Perform the following key operation from the statistical data list.
3
(TEST)
e
(F)
The following is the meaning of each item in the case of list data specification.
Data ............................ data type
"
1
................................. population standard deviation test conditions (
“
G
"
2
”
specifies two-tail test,
“
<
"
2
”
specifies one-tail test where
sample 1 is smaller than sample 2,
“
>
"
2
”
specifies one-tail
test where sample 1 is greater than sample 2.)
List(1) .......................... list whose contents you want to use as data of sample 1
List(2) .......................... list whose contents you want to use as data of sample 2
Freq(1) ........................ frequency of sample 1
Freq(2) ........................ frequency of sample 2
Save Res .................... list for storage of calculation results (None or List 1 to 20)
Execute ....................... executes a calculation or draws a graph
The following shows the meaning of parameter data specification items that are different
from list data specification.
x
1
"
n
-1
............................ standard deviation (
x
1
"
n
-1
>
0) of sample 1
n
1
................................. size (positive integer) of sample 1
x
2
"
n
-1
............................ standard deviation (
x
2
"
n
-1
>
0) of sample 2
n
2
................................. size (positive integer) of sample 2
After setting all the parameters, align the cursor with [Execute] and then press one of the
function keys shown below to perform the calculation or draw the graph.
•
1
(CALC) ... Performs the calculation.
•
6
(DRAW) ... Draws the graph.
