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 | 5.9 | 4.3 | 7.7 | 13.6 | 3.9 | 15.0 | 39.2 | 8.9 | 76.1 | 15.7 | 16.5 | 28.1 |
| Single modes | 6.7 | 5.3 | 9.0 | 13.9 | 4.0 | 14.8 | 40.4 | 8.7 | 80.6 | 25.2 | 11.9 | 38.3 |
| Truck | 7.1 | 5.9 | 9.4 | 11.7 | 5.3 | 11.8 | 12.5 | 5.8 | 17.4 | 24.2 | 10.6 | 35.5 |
| Rail | 23.5 | 9.7 | 30.0 | 49.2 | 15.1 | 76.9 | S | 19.7 | S | 4.1 | 4.2 | 6.1 |
| Water | 16.8 | 27.6 | 36.4 | 18.7 | 31.9 | 52.7 | 19.1 | 32.6 | 52.6 | 11.1 | 10.9 | 16.7 |
| Air (including truck and air) | S | 26.8 | S | S | 39.6 | S | S | 47.7 | S | 8.4 | 8.7 | 15.6 |
| Pipeline | S | S | S | S | S | S | S | S | S | S | S | S |
| Multiple modes | 18.3 | 13.7 | 22.9 | 35.7 | 43.8 | 41.0 | 40.0 | S | S | 6.9 | 8.1 | 12.7 |
| Parcel, USPS or courier | 15.5 | 14.1 | 19.5 | 16.6 | 16.9 | 23.6 | 21.2 | 20.1 | 38.2 | 6.9 | 8.2 | 12.7 |
| Truck and rail | S | 28.0 | S | 41.0 | 26.6 | 16.8 | 41.5 | 30.2 | 18.6 | 14.3 | 13.2 | 18.7 |
| Other Multiple modes | 48.4 | S | S | S | S | S | S | S | S | 32.4 | S | S |
| Other and unknown modes | 33.4 | 17.9 | 40.5 | S | 17.5 | S | S | 33.6 | S | S | 40.8 | 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.