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 | 8.7 | 17.1 | 23.1 | 22.1 | 33.4 | 51.4 | 10.0 | 10.1 | 14.1 | 17.6 | 26.7 | 76.3 |
| Single modes | 7.7 | 18.5 | 22.9 | 22.6 | 33.9 | 51.8 | 10.8 | 9.7 | 13.7 | 24.4 | 26.2 | 43.3 |
| Truck | 8.5 | 15.8 | 20.9 | 16.5 | 14.3 | 29.9 | 7.0 | 11.3 | 11.8 | 18.0 | 27.6 | 30.8 |
| Rail | S | 33.4 | S | 28.1 | 41.3 | 44.2 | 37.2 | 35.0 | 48.6 | 38.1 | 20.9 | 47.6 |
| Water | 44.1 | S | S | S | S | S | 49.0 | S | S | 26.6 | 31.6 | S |
| Air (including truck and air) | 37.9 | 36.9 | 66.4 | 48.3 | 41.2 | 77.5 | S | S | S | 8.8 | 20.4 | 27.5 |
| Pipeline | 48.6 | S | S | 48.5 | S | S | S | S | S | S | S | S |
| Multiple modes | 24.1 | 40.1 | 91.4 | 28.4 | 48.4 | 128.2 | 44.2 | 48.7 | 101.8 | 11.9 | 24.1 | 33.2 |
| Parcel, USPS or courier | 25.2 | 26.1 | 102.8 | 31.3 | 26.9 | 276.0 | 25.7 | 24.0 | 108.3 | 12.7 | 25.1 | 35.4 |
| Truck and rail | S | S | S | S | S | S | S | S | S | 26.3 | 25.9 | 53.7 |
| Other Multiple modes | S | – | S | S | – | S | S | – | S | S | – | S |
| Other and unknown modes | 31.0 | 37.8 | 27.0 | S | 34.5 | S | S | 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.