HP Prime Graphing Calculator - Manual (Page 253)

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
Hypotheticalpopulation mean
 Significance level
x
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
x x
x x