1.32 The National Bridge Inventory Program of the U.S. Federal Highway Administration, Office of Bridge Technology (http://www.fhwa.dot.gov/

bridge/britab.cfm) recorded the percent of obsolete bridges in the year 2003 by state (See Table 1.12). Bridges are classified as functionally obsolete if they have deck geometry, load carrying capacity, clearance, or approach roadway alignment that no longer meet the criteria for the system of which the bridge is a part.

a Construct a histogram and box plot for the bridge data.

b Describe the data distributions, including any unusual characteristics observed. Identify the states considered to be outliers, if any.

c Describe any changes that occur if the District of Columbia and Puerto Rico are removed from the dataset.