One–Proportion Z–Interval

Menu name

Z–INT: 1 P

 

 

This option uses the Normal Z–distribution to calculate a

 

confidence interval for the proportion of successes in a

 

population for the case in which a sample of size, n, has a

 

number of successes, x.

Inputs

The inputs are:

 

 

 

 

 

Field name

Definition

 

 

 

 

x

Sample success count.

 

n

Sample size.

 

C

Confidence level.

Results

 

 

The results are:

 

 

 

 

 

Result

Description

 

 

 

 

Critical Z

Critical value for Z.

 

π Min

Lower bound for π.

 

π Max

Upper bound for π.

 

 

 

9-18

Inference aplet