Table B-16b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics for Export by Country of Destination: 2002 and 1997
Monday, July 2, 2012
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]
| 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.