Question:
Weve all been stopped by traffic at times and have had to sit there while freeway traffic has slowed to a crawl. If you have someone with you (or some good music), the experience may be easier to put up with, but what does traffic congestion cost society? Consider the data presented in Table 5.5.5, grouping all data together as a single univariate data set.
a. Summarize the congestion costs for all these cities by finding the average.
b. Summarize the variation in congestion costs from one city to another using the standard deviation. You may view this data set as a population consisting of all available information.
c. Draw a histogram of this data set. Indicate the average and standard deviation on this graph.
d. Write a paragraph summarizing what you have learned from examining and summarizing this data set.
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TABLE 5.5.5 Cost Due to Traffic Congestion, per Registered Vehick Northeastern Cities Baltimore, MD Boston, MA Hartford, CT New York, NY Philadelphia, PA Pittsburgh, PA Washington, DC Midwestern Cities Chicago, IL Cincinnati, OH Cleveland, OH Columbus OH Detroit MI Indianapolis, IN Kansas City, MO Louisville, KY Milwaukee, WI Minneapolis-St. Paul, MN Oklahoma City, OK St. Louis, MO Southern Cities Adanta, GA Charlotte, NC Jacksonville, FL Memphis, TN Miami, FL Nashville, TN New Orleans, LA Orlando, FL Tampa, FL Southwestern Cities Abuquerque, NM Austin, T Corpus Christi, TX Congestion Cost $550 475 227 449 436 168 638 Congestion Cost 498 304 134 346 610 488 175 447 210 455 294 315 Congestion Cost 671 491 439 301 545 428 605 519 Congestion Cost 416 455 Dallas, TX Denver, CO El Paso, TX Houston, TX Phoenix, AZ Salt Lake City, UT San Antonio, TX Western Cities Honolulu, HI Los Angeles, CA Portand, OR Sacramento, CA San Diego, CA San Francisco-Oakland, CA San lose, CA Seattle, WA 641 569 210 651 552 294 428 Corgestion Cost 283 807 395 433 605 597 594 513