how to check for robustness can you do a normality check before modifying a cutoff when to do a normality check why do you do a regularity check do you need to do a normality check for a variable do you have to do a normality check before adjusting the cutoff? do you change the cutoff in the normality check when do you do a normality check can you rerun the normality check before altering the cutoff why should i perform a normality check in a t test? when checking the robustness of data, do i do a new normality check should one t-test be reordered after modifying the group cutoff? do you have to do a normality check again after the change in the group cut off? do you have to do a normality check again after a cut off does the normality test for a set of independent and dependent variables do you have to repeat normality check after each group cut-off when does it necessary to do a normality check how to perform a normality check when to do the normality check again how many groups can i test t and normality