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 | 8.5 | 5.3 | 13.4 | 5.1 | 7.4 | 10.2 | 6.6 | 13.8 | 14.1 | 8.0 | 10.8 | 12.7 |
| Single modes | 9.9 | 6.1 | 15.7 | 4.7 | 7.1 | 9.8 | 5.8 | 14.1 | 14.6 | 12.5 | 6.0 | 14.1 |
| Truck | 10.5 | 6.3 | 16.4 | 5.0 | 6.9 | 10.4 | 5.9 | 5.5 | 9.3 | 14.6 | 4.7 | 16.3 |
| Rail | 13.7 | 13.4 | 24.9 | 12.6 | 22.4 | 23.7 | 11.0 | 25.7 | 22.0 | 8.2 | 8.2 | 11.4 |
| Water | S | 39.8 | S | 46.6 | 44.4 | 185.8 | 45.7 | 45.8 | 141.8 | 22.3 | S | S |
| Air (including truck and air) | 16.3 | 15.2 | 41.4 | 12.0 | 19.6 | 32.6 | 16.7 | 18.1 | 24.6 | 7.2 | 10.0 | 10.3 |
| Pipeline | S | 49.0 | S | S | S | S | S | S | S | S | S | S |
| Multiple modes | 16.5 | 3.0 | 22.2 | 46.1 | 32.5 | 34.4 | 42.9 | 28.3 | 44.1 | 4.5 | 7.8 | 9.2 |
| Parcel, USPS or courier | 18.4 | 4.1 | 23.9 | 15.5 | 7.4 | 19.5 | 12.9 | 14.6 | 22.6 | 4.5 | 7.8 | 9.2 |
| Truck and rail | S | S | S | S | S | S | S | S | S | 22.0 | 23.6 | 42.5 |
| Other Multiple modes | S | 35.9 | S | S | 36.3 | S | S | 33.9 | S | S | S | S |
| Other and unknown modes | 15.0 | 9.2 | 23.1 | S | 32.8 | S | 34.3 | S | S | S | 27.8 | 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.