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 | 15.1 | 8.5 | 17.3 | 16.3 | 5.8 | 19.3 | 15.9 | 4.2 | 20.7 | 12.0 | 9.1 | 28.9 |
| Single modes | 17.7 | 9.9 | 20.8 | 17.0 | 8.4 | 23.9 | 17.4 | 5.4 | 24.4 | 20.0 | 10.7 | 44.3 |
| Truck | 16.3 | 11.2 | 19.6 | 20.4 | 10.6 | 31.8 | 9.7 | 6.2 | 11.6 | 15.0 | 12.4 | 19.5 |
| Rail | 15.4 | 10.8 | 21.1 | 23.2 | 11.4 | 49.3 | 28.6 | 10.2 | 61.3 | 9.6 | 4.9 | 10.8 |
| Water | S | 32.3 | S | 38.9 | 36.9 | 5.6 | 32.2 | 49.4 | 4.2 | 47.0 | S | S |
| Air (including truck and air) | 46.5 | 19.3 | 126.5 | S | 22.7 | S | S | 21.9 | S | 7.4 | 7.7 | 14.1 |
| Pipeline | 38.1 | S | S | 44.0 | S | S | S | S | S | S | S | S |
| Multiple modes | 9.3 | 11.7 | 13.5 | 21.0 | 42.1 | 30.6 | 25.0 | 15.8 | 47.3 | 8.4 | 8.3 | 22.2 |
| Parcel, USPS or courier | 9.2 | 7.8 | 13.1 | 20.2 | 18.4 | 24.8 | 32.0 | 11.8 | 58.3 | 8.4 | 8.4 | 22.4 |
| Truck and rail | 24.0 | S | S | 18.6 | 36.8 | 43.0 | 23.6 | 21.9 | 47.6 | 15.4 | 11.1 | 26.6 |
| Other Multiple modes | 35.7 | S | S | 44.5 | S | S | S | 26.0 | S | 32.1 | 15.6 | 24.7 |
| Other and unknown modes | 29.2 | 12.7 | 25.4 | 41.7 | 41.3 | 14.9 | 25.3 | 31.2 | 7.1 | S | 34.1 | 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.