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 | 9.9 | 16.8 | 22.0 | 10.6 | 12.5 | 13.7 | 13.9 | 8.3 | 23.6 | 15.9 | 19.3 | 18.3 |
| Single modes | 11.1 | 5.8 | 18.6 | 10.7 | 12.9 | 13.7 | 14.3 | 8.3 | 24.2 | 22.4 | 30.4 | 86.7 |
| Truck | 10.3 | 4.3 | 15.3 | 12.8 | 14.7 | 15.4 | 14.5 | 11.9 | 29.3 | 12.5 | 17.5 | 26.6 |
| Rail | 14.4 | 7.4 | 17.9 | 17.7 | 30.4 | 29.9 | 17.3 | 8.3 | 24.9 | 7.6 | 4.4 | 8.9 |
| Water | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
| Air (including truck and air) | 39.1 | S | S | 34.8 | S | S | 40.1 | S | S | 4.0 | 9.6 | 13.0 |
| Pipeline | S | – | S | S | – | S | S | S | S | S | S | S |
| Multiple modes | 14.5 | 47.0 | 14.1 | 37.5 | 26.9 | 31.8 | 28.1 | 24.0 | 34.0 | 13.2 | 9.7 | 10.0 |
| Parcel, USPS or courier | 16.7 | 48.5 | 13.9 | 19.7 | 42.0 | 24.8 | 18.3 | S | S | 13.2 | 9.7 | 10.0 |
| Truck and rail | 42.8 | 33.8 | 24.7 | 35.5 | 37.7 | 26.3 | 32.2 | 32.0 | 51.3 | 20.8 | 44.0 | 103.5 |
| Other Multiple modes | S | S | S | S | S | S | S | S | S | S | 34.4 | S |
| Other and unknown modes | 35.6 | 22.7 | 26.7 | S | 31.3 | S | S | 32.1 | S | S | 41.3 | 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.