why do we use the empirical distribution for our sample? explain why q-q plot is useful for this why use q q plot why do we use a q-q plot why do we use the q-q plot which distribution would you choose for a comparison of normal and empirical data? why use qq plot how do u choose an empirical distribution how to select an empirical q q q distribution why use q q plots which q-q is an empirical distribution why do we use the empirical distribution why do we use empirical distribution why use empirical distribution how to do a q-q plot why do we use empirical distribution why do we use the empirical distribution why do we choose the empirical distribution of $f_n(x)? why use the q-q distribution why does q-q use an empirical distribution