Inference app 249
Inputs The inputs are:
Results The results are:
Two-Sample T-Test
Menu name T-Test:
1
–
2
This 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,
0
:
=
.
You select one of the following alternative hypotheses
against which to test the null hypothesis:
H
0
:
1
<
2
H
0
:
1
>
2
H
0
:
1
≠
2
Field name Definition
Sample mean
s Sample standard deviation
n Sample size
0
Hypotheticalpopulation mean
Significance level
Result Description
Test T T-Test statistic
Test Value of associated with the
test t-value
P Probability associated with the
T-Test statistic
DF Degrees of freedom
Critical T Boundary value(s) of T
associated with the level that
you supplied
Critical Boundary value(s) of required
by the value that you supplied
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