You are baking a casserole. The recipe calls for 1/3 of a cup of beans to make 7 servings. How many cups of beans would you need to make 14
servings?

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.