Casio CLASSPAD 330 3.04 User Manual page 447

Input Example:
Syntax 1 (li t 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]
De cription: 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 – )%.
Lower = Lower =
Upper = Upper =
Definition of Term
C-Level: confidence level (0
x
: data (0 or positive integer)
n
: sample size (positive integer)
Calculation Re ult Output
Lower : interval lower limit (left edge)
Upper : 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%)
• Stati tic 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 1 1 x x x x
– Z – Z 1– 1–
n n n n n n n n
2 2
1 1 x x x x
x x
1– 1–
+ Z + Z
n n n n n n
n n
2 2
C-Level < 1)
20090601
n
: sample size
x
: data