Jamie wants to treat some friends to lunch. He has $40 and knows that the lunch will cost about $7 per person, p. How many people can Jamie buy lunch for?

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.