40
The following confidence interval applies when pooling is not in effect. The value 100 (1-
!
)
% is the confidence level.
Left
=
(
o
1
–
o
2
)
–
t
df
!
2
Right
=
(
o
1
–
o
2
)+
t
df
!
2
+
n
1
x
1
n
–
1
2
"
n
2
x
2
n
–
1
2
"
+
n
1
x
1
n
–
1
2
"
n
2
x
2
n
–
1
2
"
C
=
df
=
1
C
2
n
1
–
1
+
(1
–
C
)
2
n
2
–
1
+
n
1
x
1
n
–
1
2
"
n
1
x
1
n
–
1
2
"
n
2
x
2
n
–
1
2
"
Perform the following key operation from the statistical data list.
4
(INTR)
c
(T)
c
(2-Smpl)
The following shows the meaning of each item in the case of list data specification.
Data ............................ data type
C-Level ........................ confidence level (0
<
C-Level < 1)
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
Pooled ......................... pooling On (in effect) or Off (not in effect)
Save Res .................... list for storage of calculation results (None or List 1 to 20)
Execute ....................... executes a calculation
The following shows the meaning of parameter data specification items that are different
from list data specification.
