Results, Result, Description – HP 39g+ User Manual
Page 125: Test z, Prob, Critical z, Critical, Two-sample z-test, Menu name, Inputs
Inference aplet
9-9
Results
The results are:
Two-Sample Z-Test
Menu name
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
equal (H
0
:
µ1= µ2).
You select one of the following alternative hypotheses
against which to test the null hypothesis:
Inputs
The inputs 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 required
by the
α value that you
supplied.
x
x
H
1
:
µ
1
µ
2
<
H
1
:
µ
1
µ
2
>
H
1
:
µ
1
µ
2
≠
Field name
Definition
Sample 1 mean.
Sample 2 mean.
n1
Sample 1 size.
n2
Sample 2 size.
σ1
Population 1 standard
deviation.
x1
x2