Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 242

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2-SampFTest
Ü
(two-sample Ü-test; item
2-Samp
Test
standard deviations (s
Ü
, which uses the ratio of sample variances Sx1
2-Samp
Test
H
: s
=s
against one of the alternatives below.
0
1
2
H
: s
(s
)
ƒ s
1:
ƒs
2
a
1
2
H
: s
<s
(s
)
1:<
s
2
a
1
2
H
: s
>s
(s
)
1:>
s
2
a
1
2
In the example:
{7,L
SAMP4=
4, 18, 17,
L
3,
SAMP5={
L
1, 12,
L
1,
L
3, 3,
Data
Input:
Calculated
results:
Drawn results:
) computes an Ü-test to compare two normal population
E
and s
). The population means and standard deviations are all unknown.
1
2
L
5, 1, 10, 11,
L
2}
L
5, 5, 2,
L
11,
L
1,
L
3}
Chapter 13: Inferential Statistics and Distributions
2
2
/Sx2
, tests the null hypothesis
Stats
235

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