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 | 3.4 | 2.0 | 5.0 | 10.5 | 13.3 | 18.1 | 3.1 | 3.7 | 5.6 | 8.2 | 6.1 | 10.3 |
| Single modes | 3.6 | 2.7 | 5.5 | 11.2 | 13.8 | 19.0 | 4.0 | 3.4 | 6.0 | 12.0 | 7.1 | 15.7 |
| Truck | 4.1 | 2.5 | 6.1 | 17.4 | 18.5 | 26.7 | 8.7 | 5.0 | 12.5 | 13.4 | 9.6 | 20.7 |
| Rail | 17.0 | 16.6 | 19.3 | 20.5 | 9.8 | 25.9 | 21.6 | 7.5 | 23.2 | 19.3 | 4.9 | 12.2 |
| Water | 10.7 | 6.6 | 10.3 | 21.1 | 12.6 | 29.5 | 11.7 | 8.0 | 15.9 | 13.0 | S | S |
| Air (including truck and air) | 20.1 | 14.5 | 18.6 | 18.6 | 14.0 | 15.9 | 27.2 | 18.7 | 30.2 | 7.0 | 2.2 | 8.0 |
| Pipeline | 17.4 | 29.5 | 37.5 | 18.2 | 29.1 | 34.2 | S | S | S | S | S | S |
| Multiple modes | 14.3 | 5.0 | 20.3 | 22.9 | 15.4 | 40.1 | 23.2 | 13.7 | 41.0 | 7.1 | 3.0 | 7.5 |
| Parcel, USPS or courier | 14.2 | 5.3 | 20.5 | 31.7 | 8.1 | 49.2 | 11.3 | 9.5 | 17.8 | 7.1 | 3.0 | 7.5 |
| Truck and rail | 37.1 | 25.7 | 51.0 | 46.5 | 11.1 | 95.3 | 17.8 | 12.1 | 22.9 | 13.7 | 5.3 | 12.0 |
| Other Multiple modes | 27.1 | 16.8 | 100.5 | 28.9 | 22.2 | 45.9 | 37.2 | 22.6 | 82.2 | 44.6 | 26.6 | 54.7 |
| Other and unknown modes | 16.2 | 10.7 | 23.8 | 27.6 | 48.7 | 42.6 | 23.3 | 22.7 | 15.7 | 48.3 | 25.9 | 51.5 |
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.