Chapter 13: Inferential Statistics and Distributions 344
Note: All STAT TESTS examples assume a fixed-decimal mode setting of 4 (Chapter1). 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 H0:m=m0 against one of the alternatives below.
•H
a: mƒm0 (m:ƒm0)
•H
a: m<m0 (m:<m0)
•H
a: m>m0 (m:>m0)
In the example:
TEST={91.9 97.8 111.4 122.3 105.4 95}
Data Stats
Input: