Inputs, Results – HP 49g Graphing Calculator User Manual
Page 182
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Menu name:
T-Test: |il - ¡i2
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, measures the strength of the evidence for a
selected hypothesis against the null hypothesis. The null hypothesis is that
the mean of population 1 equals the mean of population 2: if
q
- P-i = hi
You select one of the following alternative hypotheses against which to
test the null hypothesis
< h2
> h2
Two-Sample T-Test
Inputs
X
1
Sample 1 mean.
x2
Sample 2 mean.
SI
Sample 1 standard deviation.
S2
Sample 2 standard deviation.
111
Sample 1 size.
ii2
Sample 2 size.
a
Significance level.
.Pooled?
Check this option to pool samples based on their
standard deviations.
Results
TestT
T-test statistic.
Prob
Probability associated with the T-test statistic.
Critical T
Bomidary value of T associated with the a level that;
supplied.
Page 9-14
Using statistics