what is ordinal data what is ordinal variance mean why mann-whitney test is used what is ordinal data used for why does the mann-whitney test do ordinal data? when is the mann-whitney test used why is the mann-whitney test used what does ordinal mean for mw why use the ordinal test why use a mann-whitney test why should a mann-whitney test be used why is a mann-whitney test used for hearing data what data does a mann-whitney test test for why should mann-whitney test be used what kind of data is ordinal why use ordinal data why use a mann-whitney test is ordinal and scale data same why is ordinal data used why does the mann-whitney test not include frequency