Hi everyone,
i performed a T-test, and for the C.I. , I got 3 lines in the t-test about this.
The first is for "group A" second is for "group B" and third is for "Diff(Group A - Group B)"
Now, I NEED TO DO AN ANALYSIS ON THE VARIABILITY OF GROUP A AND GROUP B, whether I should use the line "Diff(Group A- Group B)" or the calculations that I get by myself from the subtraction of lower bound of CI and upper bound of CI in different groups?
Thank you