HP 40G manual Two-Sample Z-Test, Results, Result Description

Results	The results are:
	Result		Description
	Test Z		Z–test statistic.
	Prob		Probability associated with the
			Z–Test statistic.
	Critical Z		Boundary values of Z associated
			with the α level that you supplied.
	Critical		Boundary values of x required by
		x
			the α value that you supplied.

Two–Sample Z–Test

Menu name	Z–Test: ∝1– ∝2
	On the basis of two samples, each from a separate population,
	this test measures the strength of the evidence for a selected
	hypothesis against the null hypothesis. The null hypothesis is
	that the mean of the two populations are equal (H0: ∝1 = ∝2).
	You select one of the following alternative hypotheses against
	which to test the null hypothesis:
		H1 ∝1 < ∝2
		H1 ∝1 > ∝2
		H1 ∝1 ≠ ∝2
Inputs	The inputs are:
	Field name	Definition
	x1	Sample 1 mean.
	x2	Sample 2 mean.
	n1	Sample 1 size.
	n2	Sample 2 size.
	σ1	Population 1 standard deviation.
	σ2	Population 2 standard deviation.
	α	Significance level.

9-10 Inference aplet