4 T-Test: Independent samples
How to perform an independent samples t-test in jamovi:
You need one grouping variable with two levels (e.g. treatment/control) and one continuous outcome variable. Make sure that the measurement levels are set2 so that the grouping variable is marked with
and the continuous variable is marked with 
.
A correct setup should look similar to this:
Select
Analyses->T-Tests->Independent Samples T-Test.
Drag and drop your outcome variable to Dependent Variables and your grouping variable to Grouping Variable.
The result is shown in the right panel