Sampztest – Texas Instruments TI-84 User Manual
Page 348
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Chapter 13: Inferential Statistics and Distributions
345
2-SampZTest
2-SampZTest
2-SampZTest
2-SampZTest
2-SampZTest
(two-sample
z
test; item
3)
tests the equality of the means of two
populations (
m
1
and
m
2
) based on independent samples when both population standard
deviations (
s
1
and
s
2
) are known. The null hypothesis H
0
:
m
1
=
m
2
is tested against one of
the alternatives below.
•
H
a
:
m
1
ƒm
2
(
m
1:
ƒm
2
)
•
H
a
:
m
1
<
m
2
(
m
1:<
m
2
)
•
H
a
:
m
1
>
m
2
(
m
1:>
m
2
)
Calculated
results:
Drawn
results:
Data
Stats
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