A school carried out a report on their Year 11 students to see the impact of doing homework regularly on final grades achieved in maths. The results are presented in the frequency tree

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.

The answers are a c d and f