T-test on column means
Quick reference
To request a T-test on column means, type:
tstat mean [;options]
after the tab or l statement.
More information
This test is similar to the T-test on column proportions, except that instead of comparing proportions it compares column means which have been created with n12 statements (this test does not work on tables of means). Where the mean in one column is significantly different from the other mean in the pair, the ID of the smaller mean is printed next to the figures in the larger column.
If two confidence levels have been defined, the ID is shown in uppercase if the test was significant at the higher level, or in lowercase if it was significant at the lower level.
To request a T-test on column means
1 Insert a tstat mean statement after the tab or l statement of the table or axis to be tested.
To run this test with a similar test for column proportions, use the option tstat propmean instead.
2 Make sure that the row axis contains an n12 statement for the mean.
The Quantum programs required to run a T-test on column means, and the tables produced, are as shown above for the test on column proportions, except that the row axis must contain an n12. The test will place letters next to those means which are significantly different from those with which they were compared.
The information in
P-values for a T-test on column proportions also applies to the T‑test on column means.
See also