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 | 3.4 | 7.3 | 8.2 | 8.0 | 10.1 | 13.3 | 24.7 | 14.3 | 26.3 | 32.0 | 12.7 | 31.3 |
| Single modes | 3.7 | 8.0 | 9.2 | 14.2 | 11.5 | 18.6 | 26.1 | 14.3 | 26.3 | 43.8 | 13.0 | 30.5 |
| Truck | 5.8 | 10.6 | 13.8 | 13.2 | 13.2 | 22.1 | 13.0 | 13.6 | 26.5 | 38.5 | 11.6 | 30.6 |
| Rail | 11.3 | 7.7 | 9.1 | 22.2 | 15.7 | 26.4 | 27.9 | 15.5 | 27.4 | 5.6 | 7.2 | 9.9 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | 40.6 | S | S | 46.4 | S | S | 46.3 | S | S | 20.1 | 4.4 | 25.2 |
| Pipeline | S | S | S | S | S | S | S | S | S | S | S | S |
| Multiple modes | 17.4 | 11.1 | 20.4 | S | 27.2 | S | S | 28.1 | S | 14.1 | 10.6 | 18.2 |
| Parcel, USPS or courier | 18.3 | 13.0 | 26.3 | 27.3 | 13.4 | 48.5 | 19.5 | 15.1 | 38.3 | 14.1 | 10.6 | 18.2 |
| Truck and rail | S | 16.5 | S | 38.7 | 31.0 | 7.8 | 48.7 | 28.9 | 14.1 | 22.7 | 11.1 | 23.4 |
| Other Multiple modes | S | S | S | S | 47.0 | S | S | S | S | S | 27.4 | S |
| Other and unknown modes | 14.9 | 21.3 | 19.0 | S | 40.1 | S | 45.8 | S | S | 49.3 | 30.5 | 89.1 |
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.