Casio ClassPad 330 User Manual page 441

Input Example:
Syntax 1 (list format)
TwoSampleZInt 0.95,15.5,13.5,list1,list2,1,1
Syntax 2 (parameter format)
TwoSampleZInt 0.95,1,1.5,418,40,402,50
Z
1-Prop Interval
Menu:
[Interval]-[One-Prop ZInt]
Description: This command obtains the confidence interval of the proportion of successes
in a population.
The confidence interval is obtained using the following expressions.
The confidence level is 100 (1 – α)%.
x x
Left = Left =
n n
Right = Right =
Definition of Terms
C-Level: confidence level (0 < C-Level < 1)
x
: data (0 or positive integer)
n
: sample size (positive integer)
Calculation Result Output
Left : interval lower limit (left edge)
Right : interval upper limit (right edge)
ˆ p
: estimated sample proportion
n
: sample size
Example
Data : 2048
Sample size : 4040
Significance level : 1% ( = confidence level : 99%)
• Statistics Wizard Operation
(1) On the menu bar, tap [Calc] and then [Interval].
(2) Select [One-Prop ZInt] and then tap [Next >>].
(3) Input values.
(4) Tap [Next >>].
7-10-5
Confidence Intervals
x x x x
1 1
– Z α – Z α
1– 1–
n n n n n n
2 2
x x x x x x
1 1
α α
+ Z + Z
1– 1–
n n n n n n
n n
2 2
20060301
n
: sample size
x
: data