HP 39g Graphing Calculator - Manual (Page 131)

Inputs The inputs are:
—
Field name Definition
x\
Sample 1 mean.
x2 Sample 2 mean.
SI Sample 1 standard deviation.
S2 Sample 2 standard deviation.
nl Sample 1 size.
n
2
Sample 2 size.
a Significance level.
_Pooled? Check this option to pool samples based on
their standard deviations.
Results The results are:
Result Description
Test T T-Test statistic.
Prob Probability associated with the T-Test
statistic.
Critical T Boundary values of T associated with
the a level that you supplied.
Inference aplet 9-15