A sample of participants took part in a hearing experiment. Among other things, the absolute hearing threshold (in decibels) was measured for each participant. The measurements were as follows:
Draw the histogram for these data using an initial class boundary of , an ending class boundary of , and classes of equal width. Note that you can add or remove classes from the figure. Label each class with its endpoints.
25,22,18,35,37,34,31,27,24,21,18,39,26,26,26,23,23,20?