HP Prime Graphing Wireless Calculator - Manual (Page 86)

82 Inference app
You select one of the following alternative hypotheses
against which to test the null hypothesis:
H
0
: μ < μ
0
H
0
: μ > μ
0
H
0
: μ ≠ μ
0
Inputs The inputs are:
Results The results are:
Two-Sample T-Test
Menu name T-Test: μ
1
– μ
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, Η
0
: μ
1
= μ
2
.
Field name Definition
Sample mean
s Sample standard deviation
n Sample size
μ
0
Hypothetical population mean
α 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 α level that
you supplied
Critical Boundary value(s) of required
by the α value that you supplied
x x
x x