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 | 8.3 | 6.6 | 14.9 | 10.4 | 7.9 | 17.2 | 11.0 | 2.4 | 16.7 | 9.4 | 5.0 | 12.7 |
| Single modes | 8.9 | 7.2 | 16.5 | 10.5 | 8.0 | 17.4 | 11.1 | 2.2 | 16.8 | 11.2 | 8.0 | 14.9 |
| Truck | 8.8 | 7.2 | 16.5 | 11.6 | 8.6 | 18.8 | 11.3 | 3.9 | 18.4 | 9.2 | 8.2 | 13.3 |
| Rail | 14.9 | 19.1 | 36.6 | 21.4 | 9.0 | 35.2 | 17.6 | 6.6 | 25.2 | 13.5 | 8.5 | 15.4 |
| Water | S | 46.1 | S | S | S | S | S | S | S | 32.1 | S | S |
| Air (including truck and air) | 26.6 | 19.3 | 24.5 | 33.0 | S | S | 30.8 | 44.4 | 30.1 | 4.3 | 6.0 | 7.6 |
| Pipeline | – | S | S | – | S | S | S | S | S | S | S | S |
| Multiple modes | 14.7 | 11.9 | 20.3 | 24.7 | 9.5 | 31.9 | 25.0 | 16.8 | 33.5 | 5.1 | 7.0 | 11.5 |
| Parcel, USPS or courier | 16.4 | 12.5 | 22.2 | 17.1 | 11.3 | 17.6 | 14.7 | 11.3 | 18.1 | 5.0 | 7.0 | 11.5 |
| Truck and rail | 27.6 | 31.8 | 24.2 | 29.4 | 22.6 | 44.1 | 29.6 | 27.1 | 34.1 | 19.3 | 20.3 | 20.7 |
| Other Multiple modes | S | S | S | S | S | S | S | 49.5 | S | S | 34.0 | S |
| Other and unknown modes | 38.6 | 14.2 | 35.0 | 21.3 | 22.7 | 36.4 | 31.3 | 42.6 | 56.6 | 19.5 | 36.1 | 26.3 |
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.