Table B-9. Estimated Measures of Reliability for Shipment Characteristics by Mode of Transportation for State of Origin: 2002 and 1997
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 | 10.2 | 8.8 | 17.4 | 17.1 | 10.5 | 16.7 | 13.7 | 13.8 | 18.1 | 13.9 | 13.1 | 15.5 |
Single modes | 11.8 | 6.7 | 19.8 | 16.5 | 10.6 | 16.1 | 14.1 | 13.3 | 18.8 | 17.1 | 14.4 | 26.6 |
Truck | 15.8 | 4.9 | 24.8 | 22.1 | 12.8 | 21.1 | 21.0 | 16.2 | 27.9 | 16.1 | 13.1 | 23.4 |
Rail | 26.5 | 31.2 | 25.2 | 32.9 | 32.4 | 33.8 | 22.0 | 26.6 | 23.5 | S | 13.4 | S |
Water | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
Air (including truck and air) | 22.4 | 28.7 | 55.6 | 49.5 | 13.8 | 112.2 | S | 12.1 | S | 5.0 | 3.5 | 7.1 |
Pipeline | S | 37.7 | S | S | 40.6 | S | S | S | S | S | S | S |
Multiple modes | 16.2 | 27.8 | 26.1 | 23.7 | 33.9 | 32.5 | 15.9 | 28.1 | 20.7 | 4.7 | 7.5 | 7.9 |
Parcel, USPS or courier | 16.7 | 28.1 | 26.1 | 24.4 | 15.6 | 29.4 | 22.5 | 24.2 | 23.8 | 4.7 | 7.5 | 7.9 |
Truck and rail | S | S | S | S | S | S | 42.8 | S | S | S | 42.5 | S |
Other Multiple modes | 47.1 | 40.0 | 250.4 | 34.6 | 42.9 | 27.7 | 34.8 | 43.0 | 25.6 | 24.3 | 34.5 | 56.0 |
Other and unknown modes | 40.3 | 16.4 | 50.5 | S | 48.8 | S | 26.2 | S | S | S | 35.6 | 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.