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 | 14.5 | 5.3 | 22.4 | 13.4 | 13.7 | 21.8 | 19.1 | 28.8 | 34.7 | 9.6 | 8.3 | 20.1 |
| Single modes | 16.5 | 6.3 | 25.3 | 14.1 | 13.8 | 22.9 | 19.8 | 27.2 | 45.4 | 25.7 | 16.5 | 52.0 |
| Truck | 18.1 | 8.8 | 30.6 | 17.5 | 19.5 | 30.5 | 13.1 | 8.1 | 33.7 | 21.1 | 18.6 | 45.4 |
| Rail | 29.6 | 19.1 | 35.8 | 25.0 | 31.1 | 42.6 | 32.1 | 36.4 | 46.7 | 11.5 | 20.5 | 35.8 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | 24.7 | 14.5 | 26.2 | S | 22.4 | S | S | 27.9 | S | 3.6 | 1.8 | 5.1 |
| Pipeline | 19.9 | 26.1 | 35.0 | 21.0 | 30.4 | 58.4 | S | S | S | S | S | S |
| Multiple modes | 10.6 | 3.7 | 17.3 | 39.7 | S | S | 43.6 | S | S | 4.1 | 3.9 | 6.4 |
| Parcel, USPS or courier | 11.0 | 3.8 | 18.4 | 13.1 | 12.0 | 24.6 | 16.9 | 12.7 | 41.3 | 4.1 | 3.9 | 6.4 |
| Truck and rail | 40.6 | S | S | S | S | S | S | S | S | 34.6 | 17.0 | 25.1 |
| Other Multiple modes | 34.0 | S | S | 40.4 | S | S | 46.0 | S | S | 38.9 | 21.4 | 18.3 |
| Other and unknown modes | 26.3 | 13.8 | 46.9 | 36.3 | 39.1 | 282.9 | 33.7 | S | S | 48.3 | 23.9 | 108.4 |
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.