HP 39g One-Proportion Z-Interval, Two-Proportion Z-Interval

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
				Sample 1 success count.
		x1
				Sample 2 success count.
			x2

Inference aplet 9-17