Your science teacher tells you that the next test is worth $0 points and contains 19 problems. Multiple-choice questions are worth 2 points each and short answer questions are worth 5 points. Find how many of each type of
question will show up on the test.

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.