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 | 20.9 | 19.7 | 37.9 | 8.9 | 21.0 | 32.4 | 23.7 | 46.5 | 53.8 | 20.5 | 17.4 | 31.8 |
| Single modes | 12.1 | 8.2 | 21.7 | 7.7 | 20.6 | 30.2 | 23.6 | 47.4 | 54.5 | 25.0 | 18.7 | 72.1 |
| Truck | 14.9 | 9.0 | 25.6 | 10.0 | 23.5 | 36.7 | 13.6 | 10.0 | 22.8 | 23.3 | 17.9 | 54.0 |
| Rail | 24.1 | 45.3 | 62.1 | 26.7 | S | S | 37.0 | S | S | 12.8 | 7.8 | 13.8 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | 33.5 | S | S | 44.7 | 22.7 | 190.2 | 46.8 | 30.4 | 269.5 | 10.2 | 6.7 | 15.4 |
| Pipeline | – | S | S | – | S | S | S | S | S | S | S | S |
| Multiple modes | 44.6 | S | S | S | 41.6 | S | S | 43.7 | S | 14.0 | 10.9 | 17.2 |
| Parcel, USPS or courier | 45.6 | S | S | 42.4 | 46.6 | 34.4 | S | S | S | 14.0 | 10.9 | 17.2 |
| Truck and rail | S | 40.4 | S | S | 23.4 | S | S | 23.6 | S | 36.1 | 29.1 | 43.6 |
| Other Multiple modes | S | S | S | S | S | S | S | S | S | S | 31.6 | S |
| Other and unknown modes | S | 21.5 | S | S | 44.9 | S | S | 40.2 | S | 31.3 | 25.1 | 426.4 |
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.