Table B-16b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics for Export by Country of Destination: 2002 and 1997

Table B-16b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics for Export by Country of Destination: 2002 and 1997

[Estimates are shown as percents and are based on data from the 2002 and 1997 Commodity Flow Surveys]

Excel | CSV

Country Value - CV Value - Std. error of percent Tons - CV Tons - Std. error of percent
2002 1997 2002 1997
Total 16.2 35.7 32.9 24.9 28.5 35.4
Canada 19.9 43.7 32.1 26.1 35.7 26.7
Mexico 28.5 43.3 32.0 29.9 S S
All Others 20.3 35.8 40.1 39.0 36.6 90.9

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.