In ranking 325 metropolitan areas in the United States, David Savageau and Geoffrey Loftus, the authors of Places Rated Almanac (published in 1997 by Macmillan, Inc.) consider the average time (in minutes) it takes a citizen of each metropolitan area to travel to work and back home each day. The data are in the file P2_11.XLS. Use Excel to obtain a simple random sample of 20 average commute times from the given set of 325 such values.

a. Generate a histogram of the number of vehicles that arrive at this toll booth over the period of this study.

b Characterize this observed arrival ‘distribution. Specifically, is it equally likely for smaller and larger numbers of vehicles to arrive during the chosen 1-minute period?