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 | 8.8 | 6.4 | 10.9 | 17.3 | 13.2 | 22.8 | 8.4 | 21.6 | 10.4 | 14.4 | 7.6 | 35.8 |
| Single modes | 10.8 | 8.1 | 13.6 | 17.9 | 13.9 | 24.2 | 8.9 | 25.4 | 12.7 | 27.9 | 9.9 | 34.2 |
| Truck | 11.0 | 8.7 | 16.0 | 18.1 | 14.8 | 25.9 | 8.1 | 25.8 | 13.6 | 25.2 | 10.6 | 22.5 |
| Rail | 36.8 | 38.2 | 5.5 | 31.9 | 29.1 | 19.3 | 34.2 | 32.9 | 16.8 | 25.6 | 17.0 | 25.5 |
| Water | – | 1.0 | – | – | S | S | – | S | S | – | S | S |
| Air (including truck and air) | 23.2 | 17.1 | 10.1 | 36.2 | 20.7 | 9.8 | 35.8 | 14.6 | 13.3 | 9.7 | 6.2 | 17.2 |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | 8.3 | 8.4 | 12.5 | 29.7 | 36.7 | 60.4 | 13.7 | S | S | 7.8 | 5.9 | 15.0 |
| Parcel, USPS or courier | 8.2 | 8.5 | 12.5 | 10.2 | 13.1 | 23.4 | 14.5 | 15.8 | 33.1 | 7.8 | 5.9 | 15.1 |
| Truck and rail | S | 46.6 | S | S | S | S | 48.2 | S | S | S | 26.2 | S |
| Other Multiple modes | S | S | S | S | S | S | S | S | S | S | 27.6 | S |
| Other and unknown modes | 18.3 | 18.0 | 17.6 | 22.9 | 24.5 | 10.4 | 12.9 | 40.9 | 6.1 | 48.9 | 28.9 | 36.2 |
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.