User Manual
TI-83 Plus Inferential Statistics and Distributions 399
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:
,,