Dealership a has a mean of 45 and an sd of 2.2 dealership b has a mean of 48 and an sd of 3.8 dealership c has a mean of 50 and an sd of 2.3 which dealership is more consistent

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.