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Chapter 13: Inferential Statistics and Distributions 344
Note: All STAT TESTS examples assume a fixed-decimal mode setting of 4 (Chapter 1). If
you set the decimal mode to
Float or a different fixed-decimal setting, your output may
differ from the output in the examples.
T-Test
T-TestT-Test
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: