Table B-9. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation for State of Origin: 2002 and 1997
Monday, July 2, 2012
Table B-9. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation for State of Origin: 2002 and 1997
[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]
| Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
| All modes | 11.2 | 5.7 | 24.4 | 20.3 | 12.0 | 42.7 | 21.9 | 19.1 | 49.3 | 7.3 | 13.3 | 12.5 |
| Single modes | 8.4 | 6.3 | 20.7 | 21.5 | 11.7 | 42.5 | 22.5 | 20.4 | 53.8 | 16.4 | 17.4 | 43.0 |
| Truck | 8.7 | 7.2 | 21.3 | 20.3 | 13.4 | 42.7 | 16.6 | 9.7 | 35.4 | 14.9 | 13.1 | 35.9 |
| Rail | 48.7 | 45.1 | 177.1 | 41.7 | 40.0 | 91.3 | 40.1 | S | S | 12.7 | 25.0 | 44.1 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | 21.3 | 24.0 | 130.4 | 43.0 | 30.5 | 76.9 | S | 34.6 | S | 6.1 | 6.1 | 11.0 |
| Pipeline | S | – | S | S | – | S | S | S | S | S | S | S |
| Multiple modes | 29.5 | 18.1 | 70.0 | 21.1 | 29.7 | 58.3 | 24.1 | 37.4 | 34.8 | 7.3 | 11.6 | 10.3 |
| Parcel, USPS or courier | 29.5 | 18.2 | 70.7 | 12.9 | 13.1 | 42.5 | 16.2 | 11.2 | 38.4 | 7.3 | 11.6 | 10.3 |
| Truck and rail | S | S | S | S | 44.3 | S | S | S | S | 30.0 | 26.0 | 30.6 |
| Other Multiple modes | 47.8 | S | S | S | S | S | S | S | S | 18.0 | 25.9 | 27.2 |
| Other and unknown modes | 24.7 | 20.1 | 30.6 | 42.6 | 44.5 | 363.0 | 26.3 | 37.1 | 21.8 | 28.3 | S | S |
KEY:
– Represents data cell
equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of high sampling
variability or poor response quality.
CV Coefficient of variation of number
NOTE: The Introduction and appendixes give information onf 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, Individual State Data, December 2004.