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 | 16.2 | 4.6 | 25.4 | 9.4 | 13.9 | 15.6 | 14.7 | 15.9 | 21.3 | 9.0 | 11.8 | 33.0 |
| Single modes | 18.6 | 5.9 | 33.3 | 9.4 | 14.5 | 16.7 | 15.5 | 14.1 | 24.4 | 13.8 | 10.9 | 33.1 |
| Truck | 20.5 | 6.9 | 37.9 | 6.2 | 17.5 | 17.3 | 17.8 | 5.2 | 30.9 | 16.2 | 11.0 | 35.3 |
| Rail | 14.8 | 12.7 | 24.0 | 23.1 | 20.4 | 36.3 | 23.6 | 22.5 | 40.8 | 14.9 | 3.1 | 13.7 |
| Water | S | 22.7 | S | 30.3 | 12.6 | 22.6 | 23.8 | 15.6 | 16.3 | 14.2 | 12.8 | 15.9 |
| Air (including truck and air) | 43.8 | 18.5 | 85.4 | 22.3 | 24.4 | 27.5 | 24.2 | 16.0 | 25.9 | 6.4 | 5.7 | 10.6 |
| Pipeline | 34.5 | S | S | 34.0 | S | S | S | S | S | S | S | S |
| Multiple modes | 20.3 | 21.0 | 33.6 | 30.6 | 29.5 | 7.0 | 34.2 | 35.5 | 9.2 | 6.9 | 11.1 | 18.4 |
| Parcel, USPS or courier | 22.3 | 11.5 | 81.6 | 19.2 | S | S | 20.9 | 10.9 | 78.8 | 6.9 | 11.7 | 19.6 |
| Truck and rail | 18.9 | 33.6 | 1.8 | 43.9 | 27.5 | 38.7 | 46.9 | 28.2 | 55.7 | 7.7 | 8.6 | 19.6 |
| Other Multiple modes | S | 41.9 | S | S | 33.9 | S | S | 39.9 | S | 37.2 | S | S |
| Other and unknown modes | 24.7 | 33.6 | 8.0 | S | 25.7 | S | S | 20.2 | S | S | 47.8 | 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.