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 | 6.1 | 8.3 | 10.5 | 21.2 | 24.3 | 31.5 | 15.7 | 23.7 | 25.0 | 4.5 | 10.6 | 15.6 |
| Single modes | 6.3 | 8.0 | 10.3 | 22.5 | 25.0 | 31.5 | 10.6 | 25.6 | 22.1 | 15.7 | 19.8 | 46.2 |
| Truck | 7.9 | 7.1 | 11.0 | 23.6 | 25.0 | 31.9 | 11.1 | 26.0 | 23.5 | 19.1 | 18.2 | 60.9 |
| Rail | S | 33.3 | S | S | S | S | S | S | S | 33.1 | 39.7 | 128.0 |
| Water | S | – | S | S | – | S | S | – | S | 28.8 | – | – |
| Air (including truck and air) | 23.9 | 27.3 | 27.6 | 18.2 | 46.7 | 15.1 | 22.9 | S | S | 7.9 | 6.7 | 9.9 |
| Pipeline | S | – | S | S | – | S | S | S | S | S | S | S |
| Multiple modes | 13.2 | 20.9 | 25.0 | 14.1 | 14.5 | 24.4 | 15.7 | 16.9 | 18.7 | 5.5 | 6.5 | 8.8 |
| Parcel, USPS or courier | 13.3 | 21.6 | 26.3 | 15.1 | 12.2 | 27.9 | 18.0 | 12.7 | 28.7 | 5.5 | 6.5 | 8.8 |
| Truck and rail | S | S | S | S | 40.4 | S | S | 40.2 | S | 29.8 | 16.7 | 36.9 |
| Other Multiple modes | 48.0 | S | S | S | S | S | S | S | S | S | S | S |
| Other and unknown modes | 24.8 | 10.6 | 30.6 | S | 35.6 | S | S | 25.9 | S | 32.3 | 48.3 | 133.5 |
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.