Casio fx-9860G AU PLUS, User Manual

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20050401
u u
u u u
2-Prop
Z
Interval
2-Prop
Z
Interval uses the number of data items to calculate the confidence interval for the
defference between the proportion of successes in two populations.
The following is the confidence interval.
α
is the level of significance. The value 100 (1 –
α
)
% is the confidence level.
Left = – – Z
α
2
x
1
n
1
x
2
n
2
n
1
n
1
x
1
1–
n
1
x
1
+
n
2
n
2
x
2
1–
n
2
x
2
Right = – + Z
α
2
x
1
n
1
x
2
n
2
n
1
n
1
x
1
1–
n
1
x
1
+
n
2
n
2
x
2
1–
n
2
x
2
n
1
,
n
2
: size of sample
x
1
,
x
2
: data
Perform the following key operations from the statistical data list.
4 (INTR)
1
(Z)
4
(2-P)
Data is specified using parameter specification. The following shows the meaning of each
item.
C-Level ........................ confidence level (0 < C-Level < 1)
x
1
................................. data value (
x
1
>
0) of sample 1
n
1
................................. size (positive integer) of sample 1
x
2
................................. data value (
x
2
> 0) of sample 2
n
2
................................. size (positive integer) of sample 2
Save Res .................... list for storage of calculation results (None or List 1 to 26)
Execute ....................... executes a calculation
After setting all the parameters, use c to move the highlighting to “Execute” and then press
the function key shown below to perform the calculation.
•
1
(CALC) ... Performs the calculation.
Calculation Result Output Example
6-6-7
Confidence Interval