what score is similar before and after which t test is appropriate for a quality of life test? is the change in scores between groups signifiable how to compare before and after scores what is the difference in scores before and after on the quality of life questions when do you test prior scores can you compare between before and after scores what score is the difference between before and after quality of life scores? when can you compare before and after score from previous test when do score changes occur in a priori how to compare scores before and after test why is a prior score important to a quality score what is the difference between baseline and score before and after what is the purpose of the test for comparing the baseline score across two groups? what is baseline and after quality of life scores how to compare score before test why are score comparisons necessary when does the baseline mean change between groups how to compare prior and after scores on a standard quality test which t test is appropriate for quantitative testing in a liscential assessment of quality of life