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 | 3.6 | 3.4 | 6.1 | 12.4 | 11.1 | 16.4 | 7.1 | 6.6 | 10.9 | 9.2 | 6.4 | 13.1 |
| Single modes | 4.3 | 4.2 | 7.6 | 12.1 | 11.1 | 16.1 | 7.5 | 4.8 | 10.5 | 9.4 | 5.5 | 10.1 |
| Truck | 4.7 | 4.3 | 8.1 | 12.6 | 12.5 | 17.7 | 9.4 | 6.5 | 14.3 | 9.0 | 5.9 | 10.6 |
| Rail | 17.3 | 22.3 | 23.1 | 15.7 | 8.9 | 18.4 | 15.1 | 5.9 | 15.8 | 8.6 | 9.6 | 15.4 |
| Water | S | – | S | S | – | S | S | – | S | 32.1 | – | – |
| Air (including truck and air) | S | 28.7 | S | 42.6 | 22.3 | 48.8 | 43.2 | 27.6 | 63.6 | 17.9 | 5.0 | 25.8 |
| Pipeline | 46.2 | 28.9 | 14.5 | 46.7 | 34.2 | 1.1 | S | S | S | S | S | S |
| Multiple modes | 13.6 | 5.4 | 13.4 | 27.7 | 34.0 | 21.9 | 16.1 | 49.6 | 23.7 | 7.2 | 7.4 | 13.0 |
| Parcel, USPS or courier | 14.6 | 6.5 | 15.0 | 11.4 | 15.6 | 14.8 | 11.0 | 12.3 | 13.8 | 7.2 | 7.4 | 13.0 |
| Truck and rail | 29.4 | 33.2 | 21.7 | 47.6 | 47.1 | 26.6 | 27.9 | S | S | 14.1 | 12.5 | 23.4 |
| Other Multiple modes | 42.7 | S | S | S | S | S | 48.5 | S | S | S | 36.5 | S |
| Other and unknown modes | 21.4 | 9.5 | 26.9 | 47.2 | 20.4 | 81.8 | 20.0 | 41.7 | 21.4 | 39.6 | 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.