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 | 7.3 | 6.7 | 10.5 | 9.6 | 8.1 | 10.6 | 19.6 | 14.8 | 17.2 | 8.2 | 14.7 | 9.7 |
| Single modes | 8.1 | 7.5 | 11.6 | 9.3 | 8.2 | 10.6 | 19.8 | 15.8 | 18.0 | 19.9 | 9.0 | 28.7 |
| Truck | 8.2 | 7.7 | 12.1 | 9.7 | 9.6 | 11.6 | 9.5 | 26.1 | 22.4 | 15.9 | 12.5 | 26.4 |
| Rail | 25.6 | 15.4 | 25.6 | 28.4 | 23.0 | 33.4 | 30.4 | 25.6 | 26.5 | 8.0 | 10.7 | 12.7 |
| Water | – | S | S | – | S | S | – | S | S | – | 27.9 | – |
| Air (including truck and air) | 26.7 | 26.7 | 20.4 | 27.4 | S | S | 29.3 | S | S | 6.4 | 4.8 | 7.3 |
| Pipeline | S | – | S | S | – | S | S | S | S | S | S | S |
| Multiple modes | 24.6 | 15.6 | 34.7 | 24.6 | S | S | 23.3 | S | S | 5.8 | 7.4 | 6.9 |
| Parcel, USPS or courier | 24.6 | 16.8 | 36.5 | 27.2 | 14.6 | 26.0 | 27.4 | 19.7 | 24.7 | 5.8 | 7.4 | 6.9 |
| Truck and rail | S | S | S | S | S | S | S | S | S | 25.5 | 17.5 | 41.6 |
| Other Multiple modes | S | S | S | S | S | S | S | S | S | 29.8 | S | S |
| Other and unknown modes | 21.4 | 17.8 | 29.9 | S | 37.2 | S | 24.2 | 27.9 | 18.8 | 34.6 | 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.