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Table B-5a. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Selected State of Origin: 2002

[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]

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State of origin Value Tons Ton–miles CV of average miles
per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
Total 3.0 – 4.2 – 4.4 – 7.1
Texas 12.8 1.9 15.9 2.5 11.3 2.3 12.7
Louisiana 7.4 0.5 7.9 0.8 10.1 1.6 33.9
California 9.1 1.0 10.8 1.1 12.3 0.7 S
Illinois 11.7 0.6 15.3 0.7 22.6 1.3 S
New Jersey 15.4 0.5 22.0 1.0 27.3 0.9 29.6
Ohio 10.9 0.5 15.6 0.6 32.2 0.6 44.5
Indiana 26.3 0.7 32.6 1.0 31.6 0.6 22.7
Michigan 24.0 0.8 19.4 0.5 48.1 0.8 24.4
Florida 14.1 0.4 12.7 0.3 14.3 0.1 31.0
Tennessee 15.7 0.4 25.1 0.5 24.9 0.6 20.6
Washington 13.0 0.3 13.0 0.4 16.6 0.3 S
Pennsylvania 18.5 0.7 20.5 0.4 26.6 0.6 21.2
New York 17.7 0.5 26.5 0.6 41.0 1.2 42.5
Georgia 8.9 0.2 16.4 0.3 24.9 0.3 33.5
Utah. 23.7 0.4 24.2 0.5 38.0 1.2 27.7
Kentucky 13.4 0.3 24.1 0.5 32.7 0.4 S
Mississippi 17.2 0.3 19.9 0.4 37.1 1.8 S
Alabama 23.0 0.3 20.0 0.3 20.6 0.2 28.3
North Carolina 17.6 0.4 18.5 0.3 26.1 0.3 37.1
West Virginia 38.4 0.2 S S S S S
All other states 3.6 0.7 5.3 1.1 8.6 1.5 18.9

KEY:
– Represents an estimate equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of highly sampling variability or poor response quality.
CV Coefficient of variation of number

NOTE: The Introduction and appendixes give information on confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs.

SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.
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