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TI-83 Plus Inferential Statistics and Distributions 414
2
.
Samp
Ü
Test
2
.
Samp
Ü
Test
(two-sample
Û
-test; item
D
) computes an
Û
-test to compare
two normal population standard deviations (
s
1
and
s
2
). The population
means and standard deviations are all unknown.
2
.
Samp
Ü
Test
, which
uses the ratio of sample variances Sx1
2
/Sx2
2
, tests the null hypothesis
H
0
:
s
1
=
s
2
against one of the alternatives below.
•
H
a
:
s
1
ƒs
2
(
s
1:
ƒs
2
)
•
H
a
:
s
1
<
s
2
(
s
1:<
s
2
)
•
H
a
:
s
1
>
s
2
(
s
1:>
s
2
)
In the example:
SAMP4={ 7
L
41817
L
3
L
5 110 11
L
2}
SAMP5={
L
112
L
1
L
33
L
552
L
11
L
1
L
3}
Data Stats
Input:
,,