Casio Algebra FX 2.0 PLUS User Manual page 44

The following confidence interval applies when pooling is not in effect. The value
α
100 (1 – ) % is the confidence level.
Left = (o
Right = (o
df =
C
n
1
C =
σ
x
1
n
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(2) .......................... list whose contents you want to use as data of sample 2
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)
σ
α
x
– o )– t 1
n
1 2
df 2
α
x
– o )+ t
1
1 2 df
2
1
2
(1–C)
2
+
–1 –1
n
2
σ
x
2
1
n–1
n
1
σ
x
2
2
+ 2
n–1 n–1
n
2
1
(List 1 to 20)
(List 1 to 20)
20011101 20010101
σ
x
2
2
+ 2
n–1 n–1
n
1 2
σ σ
x
2 2
+ 2 n–1
n–1
n
n
1 2