Casio fx-9860G SD User Manual page 342

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.
% is the confidence level.
x
Left =
n
Right =
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
................................. data value (
1
n
................................. size (positive integer) of sample 1
1
x
................................. data value (
2
n
................................. size (positive integer) of sample 2
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
is the level of significance. The value 100 (1 – )
x
1
1– n
n
x
1
1 2
– – Z
n n
2
1
2 1
x
1
1– n
n
x
x
1
1
2
– + Z
n
n n
2
1
2
x
1
x
2
20050401
n
,
1
x x x
1 2 2
1– n
x
n 1
1 2
2
+
n
2
x
x x
1
2 2
1– n
n
1 2 2
+
n
1 2
> 0) of sample 1
> 0) of sample 2
n
: size of sample
2
x
, : data
2