Find the mean, median and mode of the data set. Determine which measure of center best represents each data set. Explain your answer. 13, 25, 21, 27, 27, 21, 29, 29

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.