HP 39gs Graphing manual 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
	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.

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 11-17