HP 40G manual Two-Proportion Z-Interval, Successes in two populations, Sample 1 success count

Two–Proportion Z–Interval

Menu name	Z–INT: P1 – P2
	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 name	Definition
	x1	Sample 1 success count.
	x2	Sample 2 success count.
	n1	Sample 1 size.
	n2	Sample 2 size.
	C	Confidence level.
Results
	The results are:
	Result	Description
	Critical Z	Critical value for Z.
	Δ π Min	Lower bound for the difference between
		the proportions of successes.
	Δ π Max	Upper bound for the difference between the
		proportions of successes.

Inference aplet 9-19