A research article claims that 52% of people have at least one pet. Suppose the claim is true for a school with 450 students. What would be the ratio of the actual number of students who have a pet to the actual total number of students?

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.