Answer these questions.
What is the value of x, if 105% of 90 is equal to 200% of x?

1.05*90 = 2*x
x = (1.05*90)/2=47.25

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.