20010101
u
uu
u
u
1-Prop
Z
Interval
1-Prop
Z
Interval
uses the number of data to calculate the confidence interval for an
unknown proportion of successes.
The following is the confidence interval. The value 100 (1 –
α
) % is the confidence level.
Left
=
–
Z
α
2
Right
=
+
Z
x
n
n
1
n
x
n
x
1
–
x
n
α
2
n
1
n
x
n
x
1
–
n
: size of sample
x
: data
Perform the following key operations from the statistical data list.
4
(INTR)
b
(Z)
d
(1-Prop)
Data is specified using parameter specification. The following shows the meaning of each
item.
C-Level ........................ confidence level (0
<
C-Level < 1)
x
.................................. data (0 or positive integer)
n
.................................. size of sample (positive integer)
Save Res ..................... list for storage of calculation results (None or List 1 to 20)
Execute ....................... executes a calculation
After setting all the parameters, align the cursor with [Execute] and then press the function
key shown below to perform the calculation.
•
1
(CALC) ... Performs the calculation.
Calculation Result Output Example
Left .............................. interval lower limit (left edge)
Right ............................ interval upper limit (right edge)
ˆp
.................................. estimated sample proportion
n
.................................. size of sample
1-3-6
Confidence Interval (INTR)
20011101
