Use the indicated data to construct the frequency distribution.

Listed below are the first 50 Chicago commute times from Data Set 31. Construct a frequency distribution. Use a class width of 15 minutes and begin with a lower class limit of 0 minutes. Do the data amounts appear to have a normal distribution? Examine the data and identify anything appearing to be unique.

60 15 12 60 35 30 15 45 10 15 15 30 30 30 45 30 20 20 15 25 45 15 28 30 30 60 30 45 30 12 45 20 10 15 45 45 35 60 20 20 20 30 4 80 45 30 60 45 25 30