Two-proportion z-test, Two-proportion z-test -12, Menu name z-test – HP 39g Graphing Calculator User Manual
Page 128: P2 inputs
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Results
The results are:
Result
Description
Test P
Proportion of successes in the sample.
Test Z
Z-Test statistic.
Prob
Probability associated with the Z-Test
statistic.
Critical Z
Boundary value of Z associated with the
level you supplied.
Two-Proportion Z-Test
Menu name
z-Test:
pi
-P2
Inputs
On the basis of statistics from two samples, each from a
different population, the 2 proportion Z-Test measures the
strength of the evidence for a selected hypothesis against the
null hypothesis. The null hypothesis is that the proportion of
successes in the two populations is equal.
(H
q
:
7t,=
712
).
You select one of the following alternative hypotheses against
which to test the null hypothesis:
H j .7t I jt
2
WpTti > Jij
H
j
.7t
j
^ ^ 2 .
The inputs are:
Field name
Definition
XI
Sample 1 mean.
X2
Sample 2 mean.
nl
Sample 1 size.
n
2
Sample 2 size.
a
Significance level.
9-12
Inference aplet