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 | 5.8 | 7.1 | 13.5 | 14.0 | 13.0 | 27.2 | 11.7 | 14.5 | 24.8 | 16.6 | 11.2 | 16.7 |
| Single modes | 6.7 | 6.4 | 14.7 | 14.3 | 13.1 | 27.6 | 11.5 | 16.1 | 27.5 | 18.6 | 8.1 | 18.8 |
| Truck | 6.8 | 7.0 | 16.3 | 14.7 | 13.1 | 26.7 | 15.0 | 14.6 | 31.4 | 19.8 | 8.8 | 22.7 |
| Rail | 20.0 | 16.9 | 35.0 | 18.3 | 16.4 | 40.6 | 23.6 | 22.6 | 39.5 | 10.7 | 5.4 | 9.7 |
| Water | S | S | S | S | S | S | S | S | S | 31.6 | 31.6 | 504.3 |
| Air (including truck and air) | 27.2 | 18.5 | 20.7 | 49.9 | 36.6 | 105.4 | S | 24.0 | S | 9.0 | 14.1 | 28.9 |
| Pipeline | S | – | S | S | – | S | S | S | S | S | S | S |
| Multiple modes | 19.8 | 18.9 | 22.0 | 11.5 | 27.1 | 13.6 | 16.3 | 34.5 | 10.7 | 9.4 | 8.2 | 12.2 |
| Parcel, USPS or courier | 20.1 | 19.7 | 23.5 | 19.9 | 17.8 | 17.0 | 20.0 | 21.3 | 19.4 | 9.4 | 8.3 | 12.3 |
| Truck and rail | 30.7 | 31.5 | 12.8 | 26.4 | 47.7 | 16.4 | 37.9 | 44.5 | 8.5 | 26.4 | 17.7 | 24.6 |
| Other Multiple modes | S | S | S | S | S | S | S | S | S | S | 30.1 | S |
| Other and unknown modes | 29.6 | 19.3 | 73.7 | 27.1 | S | S | 44.2 | S | S | S | 39.2 | 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.