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 | 8.9 | 6.1 | 13.8 | 9.6 | 6.3 | 12.4 | 18.0 | 8.1 | 24.7 | 10.0 | 7.6 | 13.1 |
| Single modes | 10.3 | 5.1 | 15.1 | 10.3 | 6.2 | 13.1 | 18.3 | 9.0 | 25.3 | 14.3 | 5.5 | 17.2 |
| Truck | 8.5 | 5.9 | 13.2 | 6.4 | 6.3 | 8.8 | 9.3 | 3.2 | 11.5 | 15.4 | 6.9 | 20.1 |
| Rail | 43.2 | 13.8 | 83.3 | 44.1 | 20.4 | 71.9 | 38.1 | 23.6 | 54.9 | 13.4 | 20.8 | 37.0 |
| Water | 32.8 | 26.9 | 37.0 | 31.4 | 24.9 | 101.5 | 39.1 | 29.5 | 97.5 | 33.6 | 19.7 | 12.1 |
| Air (including truck and air) | 11.8 | 12.1 | 14.5 | 28.8 | 13.2 | 19.8 | 29.3 | 14.6 | 32.7 | 5.7 | 5.8 | 9.2 |
| Pipeline | 21.2 | 21.8 | 49.2 | 23.3 | 15.7 | 45.5 | S | S | S | S | S | S |
| Multiple modes | 9.1 | 11.6 | 16.3 | 33.6 | 21.8 | 29.2 | 37.0 | 15.3 | 49.5 | 6.2 | 5.6 | 9.0 |
| Parcel, USPS or courier | 10.7 | 15.2 | 23.3 | 10.1 | 18.7 | 26.0 | 11.4 | 28.4 | 40.8 | 6.2 | 5.7 | 9.0 |
| Truck and rail | 32.1 | 21.1 | 20.1 | 38.8 | 11.6 | 33.9 | 42.5 | 10.3 | 47.9 | 10.8 | 7.9 | 16.3 |
| Other Multiple modes | 43.5 | 31.3 | 10.6 | S | 31.7 | S | S | 37.6 | S | S | S | S |
| Other and unknown modes | 26.2 | 15.6 | 41.8 | 29.0 | 24.5 | 34.8 | 42.4 | 18.0 | 67.0 | 18.5 | 27.0 | 61.6 |
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.