Table B-12b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by For-Hire Truck for Intrastate vs Interstate for Selected Commodities: 2002
Monday, July 2, 2012
Table B-12b. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by For-Hire 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 | 5.2 | 1.9 | 1.9 | 6.2 | 1.9 | 1.9 | 9.4 | 2.8 | 2.8 | |
| 17 | Gasoline and aviation turbine fuel | 7.5 | 1.4 | 1.4 | 9.5 | 1.5 | 1.5 | 22.1 | 9.6 | 9.6 |
| 18 | Fuel oils | 7.8 | 2.5 | 2.5 | 7.6 | 2.5 | 2.5 | 27.5 | 7.8 | 7.8 |
| 19 | Coal and petroleum products, n.e.c. | 24.2 | 3.4 | 3.4 | 23.4 | 3.1 | 3.1 | 30.8 | 4.5 | 4.5 |
| 20 | Basic chemicals | 14.4 | 5.9 | 5.9 | 18.3 | 5.3 | 5.3 | 14.6 | 2.8 | 2.8 |
| 22 | Fertilizers | 36.2 | 6.5 | 6.5 | 36.2 | 5.9 | 5.9 | 38.6 | S | 5.3 |
| 23 | Chemical products and preparations, n.e.c. | 24.5 | 3.0 | 3.0 | 16.1 | 4.8 | 4.8 | 18.9 | 1.4 | 1.4 |
| – | All other SCTG codes | 10.1 | 1.7 | 1.7 | 7.4 | 2.4 | 2.4 | 19.7 | 1.3 | 1.3 |
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.