Two–sample t–test – HP 39g+ User Manual
Page 128
9-14
Inference aplet
Results
The results are:
Two–Sample T–Test
Menu name
T–Test:
µ
1 –
µ
2
The Two–sample T–Test is used when the population
standard deviation is not known. On the basis of statistics
from two samples, each sample from a different population,
this test measures the strength of the evidence for a selected
hypothesis against the null hypothesis. The null hypothesis is
that the two populations means are equal (H
0
:
µ
1
=
µ
2
).
You select one of the following alternative hypotheses against
which to test the null hypothesis
Result
Description
Test T
T–Test statistic.
Prob
Probability associated with the
T–Test statistic.
Critical T
Boundary value of T associated
with the
α
level that you supplied.
Critical
Boundary value of required by
the
α
value that you supplied.
x
x
H
1
:
µ
1
µ
2
<
H
1
:
µ
1
µ
2
>
H
1
:
µ
1
µ
2
≠