Mann - Whitney U Test for two independent samples / groups ( ordinal level sample data )

Shows two complete worked examples for conducting the Mann - Whitney U Test in SPSS. The example where the online textbook got the calculated U value to be 20 and SPSS got the calculated U value to be 22 - SPSS was correct and the online text book was incorrect ( I did the exercise "by hand" to see who was / were correct / incorrect ) . Thanks much Friends and best wishes and Enjoy !!! :)