Your class is going on a field trip. twenty-four have turned in their permission slip so far. this is 80% of the students in the class. how many students are in the class

There should be 30 students in the class as a total.

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.