Table B-11c. Estimated Standard Errors for Hazardous Material Shipment Characteristics by Selected Commodities for the United States: 2002
[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]
|SCTG Code||Commodity Description||Value||Tons||Ton-miles|
|17||Gasoline and aviation turbine fuel||1.5||1.4||1.9||0.9||2.7||4.1|
|19||Coal and petroleum products, n.e.c.||0.7||0.6||1.1||0.7||1.5||1.2|
|23||Chemical products and preparations, n.e.c.||1.1||0.4||0.2||0.1||0.6||0.3|
|–||All other SCTG codes||0.9||1.0||0.3||0.1||0.7||0.5|
– 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.