On a scale drawing, a helicopter is 2.6 feet long. The scale factor is 8 to 1.
What is the length of the actual helicopter?
A. 20.8 feet
B. 16.8 feet
C. 10.6 feet
D. 5.4 feet

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.