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 | 13.4 | 10.9 | 24.0 | 25.3 | 10.6 | 36.6 | 10.5 | 7.7 | 19.3 | 19.8 | 15.9 | 26.7 |
| Single modes | 14.3 | 12.3 | 26.9 | 25.6 | 10.7 | 37.8 | 11.1 | 7.5 | 21.5 | 18.4 | 10.3 | 20.7 |
| Truck | 14.8 | 12.3 | 28.1 | 27.1 | 11.0 | 38.8 | 11.5 | 7.9 | 19.3 | 15.5 | 7.3 | 18.2 |
| Rail | 26.7 | S | S | 43.9 | 26.3 | 149.2 | 39.4 | 38.5 | 216.3 | 15.0 | 17.7 | 44.9 |
| Water | S | – | S | S | – | S | S | – | S | 28.9 | – | – |
| Air (including truck and air) | 36.5 | 18.2 | 38.1 | 46.2 | 24.9 | 43.3 | 42.9 | 30.8 | 73.9 | 8.3 | 8.3 | 18.6 |
| Pipeline | – | S | S | – | S | S | S | S | S | S | S | S |
| Multiple modes | 14.8 | 11.0 | 20.4 | 14.7 | 25.2 | 9.0 | 16.2 | 32.5 | 16.5 | 10.9 | 7.0 | 12.4 |
| Parcel, USPS or courier | 15.4 | 10.7 | 22.0 | 22.4 | 12.9 | 41.2 | 34.2 | 12.6 | 54.0 | 11.0 | 7.0 | 12.5 |
| Truck and rail | 36.1 | 40.9 | 15.8 | 36.5 | 29.2 | 6.5 | 39.7 | 38.3 | 12.4 | 29.6 | 29.9 | 39.2 |
| Other Multiple modes | S | 40.9 | S | S | 40.8 | S | S | 40.5 | S | 44.2 | S | S |
| Other and unknown modes | 23.0 | 16.4 | 40.8 | 29.2 | 31.8 | 26.6 | 37.9 | 24.8 | 17.7 | S | 46.8 | 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.