Shapiro-Wilk Test not displaying each group of the DV
Hi. In a basic t-test, an older version of JASP will display Shapiro-Wilk Test results for each of the 2 x DVs that have two groups. However, on the new JASP, it does not show the two groups, and just shows one group. Please can you advise? One the second screenshot, the student has changed the Sunday_BDI from Scale to Ordinal (to match the first screenshot) but the same issues applied. What does the asterix mean?
T Test output on older JASP
T Test Output on newer JASP
Both are using the same data ouput.
Thanks
Comments
Hi @CrewedUp ,
We changed the normality test some time ago, because the normality assumption concerns the model residuals (model error, for the t-test that is the difference between each observation and the group mean) rather than the raw data. This means there is only a single Shapiro test, since there is only a single set of model errors per t-test.
Kind regards,
Johnny
Thank you