A circle has a circumference of 8 millimeters. What is the circle's radius? Use 3.14 for pi and round your answer to the nearest tenth.

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.