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 | 6.0 | 5.1 | 10.1 | 9.6 | 10.6 | 14.8 | 15.8 | 6.4 | 23.4 | 14.8 | 5.0 | 19.6 |
| Single modes | 7.4 | 5.9 | 12.1 | 10.3 | 11.3 | 15.6 | 15.9 | 6.8 | 24.7 | 10.9 | 8.4 | 15.0 |
| Truck | 7.6 | 6.5 | 12.8 | 11.1 | 15.3 | 18.2 | 13.5 | 5.5 | 18.9 | 13.5 | 9.3 | 16.7 |
| Rail | 22.5 | 12.8 | 40.3 | 22.6 | 10.6 | 36.9 | 25.3 | 15.2 | 49.3 | 14.3 | 8.5 | 15.6 |
| Water | S | 32.1 | S | S | 28.5 | S | S | 33.7 | S | S | 30.6 | S |
| Air (including truck and air) | 38.0 | 22.1 | 27.7 | S | 30.1 | S | S | 39.6 | S | 6.9 | 6.6 | 13.9 |
| Pipeline | S | 45.9 | S | S | S | S | S | S | S | S | S | S |
| Multiple modes | 16.3 | 10.5 | 29.1 | 48.8 | S | S | 27.8 | 25.2 | 20.8 | 9.9 | 7.6 | 15.6 |
| Parcel, USPS or courier | 16.8 | 12.1 | 32.9 | 16.8 | 12.9 | 23.9 | 16.6 | 13.0 | 23.8 | 9.9 | 7.6 | 15.6 |
| Truck and rail | 24.3 | 27.2 | 12.2 | 24.2 | S | S | 24.3 | 32.6 | 8.7 | 26.1 | 19.3 | 32.9 |
| Other Multiple modes | S | S | S | S | S | S | S | 46.7 | S | 28.9 | 40.0 | 73.0 |
| Other and unknown modes | 20.3 | 17.5 | 26.9 | 28.0 | 27.0 | 57.0 | 18.8 | 24.0 | 6.8 | S | 22.2 | 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.