Chapter 13: Inferential Statistics and Distributions 224
T-Test
T-Test (one-sample t test; item 2) performs a hypothesis test for a single unknown population mean
m when the population standard deviation s is unknown. It tests the null hypothesis H
0
: m=m
0
against one of the alternatives below.
•H
a
: mƒm
0
(m:ƒm0)
•H
a
: m<m
0
(m:<m0)
•H
a
: m>m
0
(m:>m0)
In the example:
TEST={91.9, 97.8, 111.4, 122.3, 105.4, 95}
Data Stats
Input:
Calculated
results:
Drawn
results:
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