Casio CLASSPAD330PLUS n n, n n, 1– n, Lower, Upper, 1-Prop Z Interval

ˆp : n :

x : n :

7-10-5

Confidence Intervals

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

1-Prop Z 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		α	1 x	x	n: sample size
Lower =	n	– Z	2	n n	1– n	x: data
	x		α	1 x	x
Upper =	n	+ Z	2	n n	1– n

Definition of Terms

C-Level: confidence level (0 < C-Level < 1) data (0 or positive integer) sample size (positive integer)

Calculation Result Output

Lower : interval lower limit (left edge)

Upper : interval upper limit (right edge) estimated sample proportion 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 >>].

20090601