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 | 9.5 | 10.3 | 18.5 | 15.2 | 19.3 | 35.9 | 21.5 | 22.1 | 47.0 | 20.3 | S | S |
| Single modes | 6.1 | 11.9 | 17.2 | 12.7 | 20.1 | 37.0 | 16.0 | 23.9 | 45.7 | 14.7 | 43.1 | 57.9 |
| Truck | 5.5 | 24.0 | 33.2 | 11.3 | 24.2 | 38.9 | 15.9 | 14.1 | 28.2 | 11.9 | 35.8 | 47.6 |
| Rail | 11.4 | 8.1 | 15.4 | 14.1 | 21.9 | 40.4 | 16.3 | 24.3 | 46.5 | 2.7 | 4.5 | 5.0 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | 45.8 | S | S | S | S | S | S | S | S | 13.2 | 26.0 | 46.2 |
| Pipeline | S | S | S | 38.5 | S | S | S | S | S | S | S | S |
| Multiple modes | 45.4 | 26.0 | 86.5 | S | 27.2 | S | S | 26.6 | S | 12.2 | S | S |
| Parcel, USPS or courier | S | 32.1 | S | 28.8 | S | S | 34.2 | 33.2 | 58.4 | 12.3 | S | S |
| Truck and rail | 34.5 | 43.4 | 35.1 | S | S | S | S | S | S | 21.5 | 23.8 | 32.2 |
| Other Multiple modes | S | 21.7 | S | S | 27.7 | S | S | 27.0 | S | 28.0 | 12.7 | 36.0 |
| Other and unknown modes | 22.7 | 37.2 | 44.2 | S | S | S | 35.9 | S | S | S | S | 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.