One-Proportion Z-Interval

Menu name

Z-INT: 1 π

 

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 Definition name

xSample success count.

nSample size.

CConfidence 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.

 

 

 

 

Two-Proportion Z-Interval

Menu name

Z-INT: π1 – π2

 

 

This option uses the Normal Z-distribution to calculate a

 

confidence interval for the difference between the

 

proportions of successes in two populations.

Inputs

The inputs are:

 

 

 

 

 

 

Field

 

Definition

 

name

 

 

 

 

 

 

 

x1

 

Sample 1 success count.

 

x2

 

Sample 2 success count.

 

 

 

 

Inference aplet

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