Table B-16b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics for Export by Country of Destination: 2012 and 2007
(Estimates are based on data from the 2012 and 2007 Commodity Flow Surveys)
|Country of destination||Value||Tons||Ton-miles (1)|
|Coefficient of variation of number||Standard error of percent change||Coefficient of variation of number||Standard error of percent change||Coefficient of variation of number||Standard error of percent change|
|All other countries||26.5||6.9||69.9||35.8||25.4||110.3||11.5||X||X|
KEY: X = Not applicable.
(1) Ton-miles estimates are based on estimated distances traveled along a modeled transportation network. See “Mileage Calculations” section for additional information.
NOTES: 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/econ/cfs>.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2012 Economic Census: Transportation Commodity Flow Survey, December 2014.