Table B-12c. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Private Truck for Intrastate vs Interstate for Selected Commodities: 2002
Monday, July 2, 2012
Table B-12c. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Private Truck for Intrastate vs Interstate for Selected Commodities: 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 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CV | Intrastate std. error of percentage | Interstate std. error of percentage | CV | Intrastate std. error of percentage | Interstate std. error of percentage | CV | Intrastate std. error of percentage | Interstate std. error of percentage | ||
| Total | 4.8 | 1.8 | 1.8 | 5.3 | 1.7 | 1.7 | 7.9 | 4.5 | 4.5 | |
| 17 | Gasoline and aviation turbine fuel | 5.7 | 2.6 | 2.6 | 5.8 | 2.7 | 2.7 | 13.4 | 6.1 | 6.1 |
| 18 | Fuel oils | 6.0 | 1.2 | 1.2 | 6.3 | 1.6 | 1.6 | 13.8 | 6.5 | 6.5 |
| 19 | Coal and petroleum products, n.e.c. | 15.0 | 3.2 | 3.2 | 24.7 | 3.1 | 3.1 | 19.1 | 6.2 | 6.2 |
| 20 | Basic chemicals | 15.1 | 3.0 | 3.0 | 22.7 | 3.5 | 3.5 | 29.6 | 4.3 | 4.3 |
| 22 | Fertilizers | 28.7 | 7.6 | 7.6 | 23.5 | 7.0 | 7.0 | 25.8 | 10.0 | 10.0 |
| 23 | Chemical products and preparations, n.e.c. | 17.5 | 6.6 | 6.6 | 21.6 | 4.5 | 4.5 | 23.7 | 4.0 | 4.0 |
| – | All other SCTG codes | 12.5 | 3.9 | 3.9 | 32.8 | 7.2 | S | 36.9 | 6.4 | 6.4 |
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.