Table B-9. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation for State of Origin: 2002 and 1997
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 | 8.7 | 5.9 | 13.3 | 15.0 | 11.1 | 22.2 | 18.0 | 20.0 | 34.7 | 5.7 | 13.6 | 17.6 |
| Single modes | 10.2 | 5.4 | 14.9 | 14.6 | 11.3 | 21.8 | 15.9 | 16.2 | 29.0 | 19.7 | 31.8 | 90.0 |
| Truck | 8.7 | 5.9 | 13.1 | 19.0 | 14.3 | 27.9 | 26.3 | 13.8 | 38.0 | 20.8 | 31.3 | 73.9 |
| Rail | 19.5 | 17.7 | 26.1 | 15.3 | 17.6 | 27.6 | 16.7 | 25.5 | 38.8 | 8.1 | 10.0 | 10.9 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | 42.9 | 15.9 | 90.3 | 38.9 | 41.2 | 30.1 | S | 45.4 | S | 2.3 | 2.5 | 4.3 |
| Pipeline | S | S | S | S | S | S | S | S | S | S | S | S |
| Multiple modes | 11.3 | 9.0 | 16.9 | 33.6 | S | S | 38.0 | S | S | 3.5 | 3.7 | 5.0 |
| Parcel, USPS or courier | 11.6 | 9.4 | 18.0 | 19.4 | 20.8 | 22.6 | 16.1 | 28.3 | 24.4 | 3.3 | 3.7 | 5.0 |
| Truck and rail | 37.1 | 28.1 | 17.9 | S | 37.3 | S | 44.5 | 31.6 | 55.3 | 21.2 | 18.2 | 44.1 |
| Other Multiple modes | S | S | S | 44.1 | S | S | 45.8 | S | S | S | 27.3 | S |
| Other and unknown modes | 16.3 | 19.1 | 31.2 | 40.2 | 38.0 | 89.8 | 38.5 | 35.3 | 62.7 | 34.4 | 36.5 | 28.0 |
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.