Texas Instruments TI-84 Plus - 2-Samp Ttest

Chapter 13: Inferential Statistics and Distributions 347
2-SampTTest
2-SampTTest2-SampTTest
2-SampTTest
2-SampTTest (two-sample t test; item 4) tests the equality of the means of two
populations (m
1
and m
2
) based on independent samples when neither population
standard deviation (s
1
or s
2
) is known. The null hypothesis H
0
: m
1
=m
2
is tested against
one of the alternatives below.
•H
a
: m
1
ƒm
2
(m1:ƒm2)
•H
a
: m
1
<m
2
(m1:<m2)
•H
a
: m
1
>m
2
(m1:>m2)
In the example:
Drawn
results:
Data Stats