Texas Instruments 83PL/CLM/1L1/V - 83 Plus Calc, Manual Book, Page: 417 / 827

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 4 18 17 L 3 L 5 1 10 11 L 2}
SAMP5={ L 1 12 L 1 L 3 3 L 5 5 2 L 11 L 1 L 3}
Data Stats
Input:
, ,