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20070201
The following confi dence interval applies when pooling is not in effect. α is the level of
signifi cance. The value 100 (1 – α ) % is the confi dence level.
Perform the following key operations from the statistical data list.
4 (INTR)
2 (t)
2 (2-S)
The following shows the meaning of each item in the case of list data specifi cation.
Data ............................. data type
C-Level ........................confi dence level (0 < C-Level < 1)
List(1) ........................... list whose contents you want to use as data of sample 1
(List 1 to 26)
List(2) ........................... list whose contents you want to use as data of sample 2
(List 1 to 26)
Freq(1) ......................... frequency of sample 1 (1 or List 1 to 26)
Freq(2) ......................... frequency of sample 2 (1 or List 1 to 26)
Pooled .......................... pooling On (in effect) or Off (not in effect)
Save Res .....................list for storage of calculation results (None or List 1 to 26)
Execute ........................executes a calculation
The following shows the meaning of parameter data specifi cation items that are different
from list data specifi cation.
Left = (o
1
– o
2
)– t
df
α
2
R
ight = (o
1
– o
2
)+ t
df
α
2
+
n
1
x
1 n–1
2
σ
n
2
x
2 n–1
2
σ
+
n
1
x
1 n–1
2
σ
n
2
x
2 n–1
2
σ
Left = (o
1
– o
2
)– t
df
α
2
R
ight = (o
1
– o
2
)+ t
df
α
2
+
n
1
x
1 n–1
2
σ
n
2
x
2 n–1
2
σ
+
n
1
x
1 n–1
2
σ
n
2
x
2 n–1
2
σ
C =
df =
1
C
2
n
1
–1
+
(1–C)
2
n
2
–1
+
n
1
x
1 n–1
2
σ
n
1
x
1 n–1
2
σ
n
2
x
2 n–1
2
σ
C =
df =
1
C
2
n
1
–1
+
(1–C)
2
n
2
–1
+
n
1
x
1 n–1
2
σ
n
1
x
1 n–1
2
σ
n
2
x
2 n–1
2
σ
6-6-10
Confi dence Interval