Quiz

A study was done to find the distribution of the amount of change that people have in their pockets.  Twenty four people with change in their pockets were randomly selected.  The amount of change in their pockets is shown below.  If you want to construct a histogram with five class intervals, what should the class width be?

20,21,23,24,26,26,28,28,29,29,30,31,34,36,38,41,43,47,52,55,61,68,74,80