Texas Instruments TI-84 PLUS Guidebook - Page 232
SampZTest, LISTA={154
UPC - 033317192120
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2-SampZTest 2-SampZTest (two-sample z test; item 3) tests the equality of the means of two populations (m1 and m2) based on independent samples when both population standard deviations (s1 and s2) are known. The null hypothesis H0: m1=m2 is tested against one of the alternatives below. • Ha: m1ƒm2 (m1:ƒm2) • Ha: m1m2) In the example: LISTA={154, 109, 137, 115, 140} LISTB={108, 115, 126, 92, 146} Data Input: Stats Calculated results: Drawn results: Chapter 13: Inferential Statistics and Distributions 225
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Chapter 13: Inferential Statistics and Distributions
225
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
)
In the example:
LISTA={154, 109, 137, 115, 140}
LISTB={108, 115, 126, 92, 146}
Data
Stats
Input:
Calculated
results:
Drawn
results: