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 | 19.6 | 10.5 | 26.8 | 23.8 | 9.4 | 33.1 | 9.2 | 5.8 | 10.2 | 12.0 | 16.4 | 14.6 |
| Single modes | 23.2 | 13.3 | 34.6 | 25.9 | 7.9 | 39.0 | 10.8 | 6.5 | 12.2 | 22.9 | 16.0 | 29.3 |
| Truck | 7.7 | 2.8 | 10.7 | 36.8 | 10.1 | 54.1 | 8.5 | 3.7 | 10.0 | 10.6 | 16.0 | 16.6 |
| Rail | 17.9 | 10.1 | 22.2 | 25.9 | 20.8 | 67.3 | 25.6 | 13.1 | 27.6 | 8.3 | 7.9 | 12.7 |
| Water | 40.9 | 17.7 | 26.1 | S | 25.4 | S | 47.1 | 23.7 | 24.8 | 16.7 | 10.5 | 17.8 |
| Air (including truck and air) | S | 38.7 | S | 37.3 | 23.5 | 88.7 | S | 23.2 | S | 4.8 | 3.1 | 6.8 |
| Pipeline | 9.0 | 31.9 | 48.6 | 11.7 | 33.2 | 53.8 | S | S | S | S | S | S |
| Multiple modes | 17.7 | 15.5 | 22.7 | 16.3 | 18.3 | 16.4 | 18.8 | 10.8 | 21.4 | 9.9 | 10.4 | 11.0 |
| Parcel, USPS or courier | 18.3 | 17.4 | 25.2 | 19.7 | 11.5 | 27.4 | 26.6 | 19.9 | 34.4 | 10.2 | 10.5 | 11.1 |
| Truck and rail | 31.6 | 13.3 | 21.2 | 23.5 | 24.3 | 25.0 | 22.3 | 18.5 | 27.1 | 4.7 | 9.2 | 10.2 |
| Other Multiple modes | 27.6 | 16.3 | 23.9 | 32.3 | 39.8 | 23.1 | 36.0 | 17.4 | 41.7 | 5.9 | 7.9 | 12.5 |
| Other and unknown modes | 27.8 | 14.7 | 15.4 | 27.1 | 30.5 | 21.1 | 17.8 | S | S | S | S | 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.