At the kansas city airport, a group of pilots for skyways and yellow jet airlines were asked whether their flights were flying east or west. the two-way table shows their answers.

flight directions

which joint frequency has the most flights?

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.