I was given a data set which basically told of the differences in flexibility between middle aged and young men. The flexibility was rated on a scale of 1-10 (ten being the best, one being the worst). I was given values for this flexibility test for both middle aged and young men. (for example, I was given 1000 values of young men scoring a 5 and 1000 values of old men scoring a 5). If I wanted to graph this, could I use a back to back histogram (sort of like http://www.petermcm.dircon.co.uk/software/og_bar_chart/fancy_graph.png) and graph it? The shared Y axis would be the flexibility rating from 1-10 and the x axises would be the frequency of both middle aged and young men.