Prac
do you understand?
show me! is a number with
3 digits always greater than a
number with 2 digits? how do
you know?

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.