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 | 6.6 | 6.3 | 11.8 | 16.3 | 5.3 | 23.6 | 14.2 | 8.3 | 15.8 | 15.0 | 10.9 | 29.8 |
| Single modes | 7.3 | 6.9 | 12.8 | 15.9 | 5.5 | 23.0 | 14.4 | 8.2 | 16.1 | 16.8 | 15.2 | 29.9 |
| Truck | 6.4 | 6.4 | 11.5 | 18.7 | 6.3 | 33.0 | 8.9 | 5.1 | 13.4 | 14.9 | 15.7 | 21.7 |
| Rail | 23.6 | 19.7 | 48.8 | 21.6 | 13.2 | 16.9 | 25.2 | 16.2 | 22.4 | 11.6 | 14.2 | 16.3 |
| Water | S | S | S | S | S | S | S | S | S | 27.9 | 31.6 | S |
| Air (including truck and air) | 25.1 | 28.2 | 41.6 | 34.5 | 32.5 | 43.2 | 31.2 | 30.0 | 46.3 | 5.6 | 2.1 | 6.7 |
| Pipeline | S | 24.9 | S | S | 29.8 | S | S | S | S | S | S | S |
| Multiple modes | 10.4 | 12.7 | 17.7 | S | 20.2 | S | S | 32.5 | S | 14.4 | 4.5 | 18.5 |
| Parcel, USPS or courier | 10.3 | 14.3 | 19.6 | 20.6 | 20.0 | 33.7 | 23.5 | 14.5 | 30.9 | 14.5 | 4.6 | 18.6 |
| Truck and rail | S | 27.5 | S | S | 30.3 | S | S | 27.9 | S | 38.0 | 11.4 | 14.2 |
| Other Multiple modes | S | S | S | S | S | S | S | S | S | 29.8 | 30.0 | 27.0 |
| Other and unknown modes | 31.8 | 14.9 | 99.4 | 24.4 | 22.2 | 47.8 | 26.8 | 30.9 | 56.0 | 42.1 | 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.