HP 39g+ Graphing manual Two-Sample Z-Interval

Results	The results are:
	Result	Description
	Critical Z	Critical value for Z.
	∝ min	Lower bound for ∝.
	∝ max	Upper bound for ∝.

Two-Sample Z-Interval

Menu name	Z-INT: ∝1– ∝2
	This option uses the Normal Z-distribution to calculate a
	confidence interval for the difference between the means
	of two populations, ∝1– ∝2, when the population standard
	deviations, σ1 and σ2, are known.
Inputs	The inputs are:
	Field		Definition
	name
			Sample 1 mean.
		x1
			Sample 2 mean.
		x2
	n1		Sample 1 size.
	n2		Sample 2 size.
	σ1		Population 1 standard deviation.
	σ2		Population 2 standard deviation.
	C		Confidence level.
Results
	The results are:
	Result		Description
	Critical Z		Critical value for Z.
	∆ ∝ Min		Lower bound for ∝1 – ∝2.
	∆ ∝ Max		Upper bound for ∝1 – ∝2.

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