Morally 'right' actions
Histograms are good displays of data sets containing large or moderate counts, such as attendance figures at football matches. (If all counts are small, bar charts are better.)
In this data set, it could be argued that a bar chart would be better since there are only 38 possible values (0 to 37). However by reducing class width to 1, it does allow you to explain that:
A class width of 3 gives a reasonably smooth picture of the distribution here.
The data set shows scores from 106 volunteers on a 'motivation scale'. They chose between two actions in response to each of 37 situations. The score is the number of morally right actions chosen (the other actions satisfied short-term gains).