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 | 14.5 | 7.5 | 22.8 | 14.2 | 48.2 | 43.4 | 38.1 | 16.9 | 78.2 | 10.0 | 11.4 | 20.4 |
| Single modes | 18.2 | 9.7 | 27.5 | 14.5 | 49.1 | 43.7 | 36.8 | 16.6 | 75.8 | 22.5 | 24.5 | 75.4 |
| Truck | 18.8 | 9.9 | 28.2 | 14.5 | 49.1 | 43.7 | 37.3 | 17.0 | 77.5 | 24.0 | 26.7 | 82.1 |
| Rail | S | S | S | S | S | S | S | S | S | S | 28.0 | S |
| Water | 49.0 | – | – | S | – | S | S | – | S | S | – | S |
| Air (including truck and air) | 19.1 | 28.3 | 100.0 | 36.7 | 28.8 | 124.5 | S | 33.7 | S | 11.0 | 9.3 | 14.2 |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | 13.8 | 15.8 | 32.9 | 24.6 | 16.1 | 48.4 | 32.4 | 14.8 | 66.7 | 6.2 | 7.4 | 9.6 |
| Parcel, USPS or courier | 13.8 | 15.8 | 32.9 | 24.7 | 16.1 | 48.5 | 32.5 | 14.8 | 67.2 | 6.2 | 7.4 | 9.6 |
| Truck and rail | S | S | S | S | S | S | S | S | S | 31.6 | 32.8 | 92.8 |
| Other Multiple modes | S | – | S | S | – | S | S | – | S | S | – | S |
| Other and unknown modes | 38.7 | 34.3 | 80.7 | S | 46.3 | S | S | S | S | 39.2 | 37.2 | 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.