Two-Sample Z-Test - HP 40gs User Manual

hp40g+.book Page 9 Friday, December 9, 2005 1:03 AM
Results

Two-Sample Z-Test

Menu name
Inputs
Inference aplet
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.
Boundary values of
Critical x
by the α value that you
supplied.
Z-Test: μ1–μ2
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
: μ1= μ2).
equal (H
0
You select one of the following alternative hypotheses
against which to test the null hypothesis:
H
H
H
The inputs are:
Field name Definition
Sample 1 mean.
x1
Sample 2 mean.
x2
n1 Sample 1 size.
n2 Sample 2 size.
σ1
Population 1 standard
deviation.
x required
< μ
:μ
1 1 2
> μ
:μ
1 1 2
≠ μ
:μ
1 1 2
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