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 | 6.9 | 6.2 | 13.2 | 11.8 | 6.3 | 16.6 | 9.4 | 4.2 | 11.4 | 9.9 | 2.9 | 9.7 |
| Single modes | 7.1 | 6.6 | 14.5 | 12.2 | 6.5 | 17.1 | 9.6 | 5.0 | 12.6 | 20.3 | 11.8 | 25.5 |
| Truck | 7.8 | 7.3 | 16.1 | 12.7 | 8.5 | 20.0 | 10.7 | 6.0 | 17.9 | 18.0 | 14.2 | 23.3 |
| Rail | 19.6 | 12.2 | 27.2 | S | 15.4 | S | 21.2 | 13.1 | 21.5 | 14.4 | 10.3 | 43.5 |
| Water | 43.2 | 41.2 | 19.1 | S | S | S | S | S | S | S | S | S |
| Air (including truck and air) | 21.6 | 19.9 | 49.6 | 38.1 | S | S | 41.5 | S | S | 5.2 | 10.9 | 20.8 |
| Pipeline | 49.5 | S | S | S | S | S | S | S | S | S | S | S |
| Multiple modes | 9.7 | 4.0 | 11.6 | 16.9 | 20.8 | 9.7 | 10.7 | 21.7 | 7.7 | 3.7 | 3.2 | 5.3 |
| Parcel, USPS or courier | 9.8 | 3.9 | 11.8 | 12.1 | 7.4 | 18.1 | 15.4 | 7.7 | 25.3 | 3.7 | 3.3 | 5.3 |
| Truck and rail | 27.7 | 15.6 | 14.7 | 38.2 | 28.5 | 11.5 | 29.8 | 17.9 | 14.6 | 22.2 | 19.6 | 45.5 |
| Other Multiple modes | S | 41.5 | S | S | 30.2 | S | S | 31.1 | S | 24.3 | 27.2 | 27.1 |
| Other and unknown modes | 35.4 | 14.5 | 46.1 | 19.4 | 13.0 | 76.6 | 24.3 | 21.9 | 45.5 | 39.6 | 18.2 | 21.1 |
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.