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 | 5.2 | 3.8 | 7.9 | 9.1 | 12.7 | 15.4 | 14.0 | 5.4 | 22.8 | 9.5 | 4.7 | 12.6 |
Single modes | 3.9 | 4.1 | 6.7 | 9.1 | 13.1 | 15.2 | 15.1 | 5.1 | 24.1 | 8.0 | 11.0 | 13.5 |
Truck | 4.2 | 4.5 | 7.3 | 11.3 | 14.2 | 14.7 | 7.8 | 5.3 | 9.9 | 8.3 | 10.2 | 14.3 |
Rail | 26.5 | 12.3 | 31.8 | 25.0 | 13.3 | 72.7 | 15.5 | 12.1 | 58.9 | 7.7 | 6.4 | 11.0 |
Water | S | 31.7 | S | S | 34.7 | S | S | S | S | 33.3 | 31.3 | 37.2 |
Air (including truck and air) | 15.7 | 13.2 | 13.5 | 41.6 | 17.9 | 44.4 | 37.8 | 19.0 | 49.1 | 9.0 | 7.7 | 11.6 |
Pipeline | S | 42.4 | S | S | 44.8 | S | S | S | S | S | S | S |
Multiple modes | 18.6 | 6.4 | 29.9 | 13.9 | 14.6 | 39.2 | 16.9 | 8.8 | 44.6 | 4.2 | 3.8 | 6.0 |
Parcel, USPS or courier | 18.3 | 6.9 | 23.3 | 16.8 | 6.8 | 20.3 | 20.0 | 7.0 | 26.8 | 4.4 | 3.8 | 6.1 |
Truck and rail | S | 13.2 | S | 24.2 | 34.0 | 121.9 | 25.5 | 14.6 | 96.9 | 6.7 | 11.3 | 13.9 |
Other Multiple modes | 45.9 | 44.9 | 104.2 | 45.6 | 49.3 | 61.4 | S | S | S | 32.8 | 24.1 | 14.1 |
Other and unknown modes | 23.4 | 12.0 | 35.5 | 36.9 | 16.1 | 114.1 | 30.2 | 35.6 | 49.0 | S | 20.6 | 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.