Kevin asked some of his friends how many hours they had worked during the previous week at their after-school jobs. the results are shown below.
6 6 6 4 6 6 9 7 6 3 7 6
6 7 6 6 7 6 6 7 6 7 7 4
construct a frequency distribution showing class limits, class boundaries, midpoints, frequency, and relative frequencies. use 4 classes