Juan, Mary, Celia, and mark work as information specialists at a high tech company. they each spent a certain amount of time fixing a problem with the database. Out of the total number of hours all the workers spent. What percent of the time is Celia's.

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.