Hypothesis Tests; One-Sample Z-Test - HP 40gs User Manual
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hp40g+.book Page 8 Friday, December 9, 2005 1:03 AM
Hypothesis tests
One-Sample Z-Test
Menu name
Inputs
11-8
You use hypothesis tests to test the validity of hypotheses
that relate to the statistical parameters of one or two
populations. The tests are based on statistics of samples
of the populations.
The HP 40gs hypothesis tests use the Normal
Z-distribution or Student's t-distribution to calculate
probabilities.
Z-Test: 1 μ
On the basis of statistics from a single sample, the
One-Sample Z-Test measures the strength of the evidence
for a selected hypothesis against the null hypothesis. The
null hypothesis is that the population mean equals a
specified value Η
: μ = μ
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
x
Sample mean.
n
Sample size.
μ
Hypothetical population mean.
0
σ
Population standard deviation.
α
Significance level.
.
0
<
μ
:μ
1
1
2
>
μ
:μ
1
1
2
≠
μ
:μ
1
1
2
Inference aplet
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