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 | 9.0 | 6.0 | 10.0 | 12.2 | 10.2 | 12.6 | 16.9 | 13.7 | 14.6 | 13.0 | 13.8 | 6.5 |
| Single modes | 10.4 | 6.1 | 12.3 | 12.4 | 10.3 | 12.7 | 17.0 | 14.1 | 15.0 | 18.1 | 18.7 | 43.0 |
| Truck | 7.3 | 8.8 | 12.3 | 14.5 | 9.9 | 15.8 | 9.4 | 21.4 | 20.7 | 13.0 | 6.1 | 20.9 |
| Rail | 20.6 | 16.8 | 14.5 | 16.8 | 16.2 | 13.7 | 24.9 | 16.1 | 16.6 | 14.0 | 15.5 | 21.6 |
| Water | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
| Air (including truck and air) | 36.5 | 15.2 | 17.7 | 42.7 | 36.3 | 12.8 | 39.2 | 40.3 | 20.0 | 7.3 | 5.6 | 13.7 |
| Pipeline | S | S | S | 49.1 | S | S | S | S | S | S | S | S |
| Multiple modes | 16.0 | 21.7 | 12.8 | 43.1 | 15.4 | 101.4 | S | 19.7 | S | 10.8 | 6.4 | 8.0 |
| Parcel, USPS or courier | 16.3 | 21.7 | 12.4 | 22.9 | 15.4 | 21.2 | 17.3 | 19.7 | 13.3 | 10.8 | 6.4 | 8.0 |
| Truck and rail | S | S | S | S | S | S | S | S | S | 29.8 | 30.0 | 38.1 |
| Other Multiple modes | S | – | S | S | – | S | S | – | S | 34.6 | – | – |
| Other and unknown modes | 30.1 | 18.1 | 27.6 | S | 42.9 | S | 49.5 | S | S | 31.2 | S | 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.