Propztest – Texas Instruments TI-84 User Manual
Page 353
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Chapter 13: Inferential Statistics and Distributions
350
2-PropZTest
2-PropZTest
2-PropZTest
2-PropZTest
2-PropZTest
(two-proportion
z
test; item
6
) computes a test to compare the proportion of
successes (p
1
and p
2
) from two populations. It takes as input the count of successes in
each sample (
x
1
and
x
2
) and the count of observations in each sample (
n
1
and
n
2
).
2-PropZTest
tests the null hypothesis H
0
: p
1
=p
2
(using the pooled sample proportion
Ç)
against one of the alternatives below.
•
H
a
: p
1
ƒp
2
(
p1:
ƒ
p2
)
•
H
a
: p
1
<p
2
(
p1:<p2
)
Calculated
results:
Drawn
results:
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