Casio ALGEBRA FX 2.0 PLUS - Manual (Page 44)

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The following confidence interval applies when pooling is not in effect. The value
100 (1 –
α
) % is the confidence level.
Left = ( o
1
– o
2
)– t
df
α
2
Right = ( 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
Perform the following key operations 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 1 to 20)
List(2) .......................... list whose contents you want to use as data of sample 2
(List 1 to 20)
Freq(1) ........................ frequency of sample 1 (1 or List 1 to 20)
Freq(2) ........................ frequency of sample 2 (1 or List 1 to 20)
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.
1-3-10
Confidence Interval (INTR)
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