A sample of18participants took part in a hearing experiment. Among other things, the absolute hearing threshold (in decibels) was measured for each participant. The18

measurements were as follows:25,22,18,35,37,34,31,27,24,21,30,30,30,26,26,23,23,20

Draw thehistogramfor these data using an initial class boundary of17.5

and a class width of4. Note that you can add or remove classes from the figure. Label each class with its endpoints.