Sampftest – Texas Instruments TI-84 User Manual
Page 364
Chapter 13: Inferential Statistics and Distributions
361
2-SampFTest
2-SampFTest
2-SampFTest
2-SampFTest
2-Samp
Ü
Test
(two-sample
Ü-test; item
E
) computes an
Ü-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
)
Calculated
results:
Drawn results: