jamovi

Ah, the more you know! Now I understand much better, thank you both for your explanations, it's much clearer for me!

Thanks for your answer !
If I understand correctly, I always have to assume Jamovi is asking the first data (on the left in the box) to be the post-test, and the second data (on the right in the box) to be the pre-test ? It seems very counterintuitive, do you know why it'works that way ?

Hi ! Today I was doing a paired sample t-test, and the results were... strange. For a study, participants completed a questionnaire at two times : pre-test and post-test. When I look at my data, I see participants improved their BMI, and decreased their level of stress. There is no mistake here, I t...