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 | 11.9 | 7.3 | 17.5 | 34.5 | 14.3 | 73.6 | 23.4 | 40.0 | 51.9 | 22.9 | 14.2 | 23.3 |
| Single modes | 14.4 | 9.4 | 22.1 | 35.3 | 15.6 | 90.0 | 27.2 | 42.3 | 54.0 | 22.7 | 14.7 | 35.7 |
| Truck | 18.6 | 13.4 | 31.4 | 27.8 | 26.9 | 60.1 | 31.5 | 28.7 | 90.7 | 17.0 | 18.2 | 31.3 |
| Rail | 40.0 | 40.7 | 190.1 | S | 41.0 | S | 36.6 | 41.2 | 234.2 | 22.8 | 25.8 | 32.5 |
| Water | 22.8 | 35.8 | 18.8 | 48.7 | 48.8 | 31.7 | S | S | S | 35.1 | 21.0 | 18.9 |
| Air (including truck and air) | 25.6 | 37.1 | 30.2 | 19.5 | S | S | 21.0 | 43.0 | 73.6 | 13.4 | 10.3 | 20.3 |
| Pipeline | 44.4 | 32.5 | 167.6 | 43.0 | 33.6 | 142.7 | S | S | S | S | S | S |
| Multiple modes | 26.0 | 19.2 | 44.1 | S | 39.6 | S | S | 21.5 | S | 12.9 | 12.9 | 17.6 |
| Parcel, USPS or courier | 17.4 | 25.1 | 23.3 | 19.4 | 33.8 | 36.1 | 38.4 | 42.1 | 50.8 | 15.3 | 13.2 | 17.7 |
| Truck and rail | S | S | S | S | S | S | S | S | S | 31.6 | 30.3 | 217.8 |
| Other Multiple modes | 32.2 | 39.6 | 111.9 | S | 43.4 | S | S | 27.6 | S | 10.2 | 32.8 | 79.9 |
| Other and unknown modes | 21.6 | 28.0 | 25.8 | S | 40.6 | S | 28.2 | S | S | S | 24.7 | 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.