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 | 5.1 | 8.3 | 10.8 | 11.8 | 5.0 | 13.8 | 10.6 | 4.7 | 12.1 | 7.2 | 10.5 | 16.1 |
| Single modes | 5.2 | 8.8 | 11.5 | 11.3 | 5.0 | 13.1 | 10.9 | 4.8 | 12.6 | 8.3 | 8.2 | 14.2 |
| Truck | 5.4 | 9.0 | 12.0 | 9.8 | 6.0 | 11.7 | 8.8 | 4.6 | 10.3 | 8.4 | 6.0 | 14.3 |
| Rail | 22.2 | 9.0 | 26.4 | S | 11.4 | S | 30.2 | 9.8 | 39.0 | 21.2 | 14.7 | 16.7 |
| Water | S | S | S | S | S | S | S | S | S | 27.4 | 30.5 | 22.0 |
| Air (including truck and air) | 22.2 | 32.6 | 17.8 | 27.8 | 22.6 | 28.5 | 36.3 | 18.9 | 41.4 | 8.3 | 4.3 | 11.3 |
| Pipeline | S | 42.1 | S | S | 36.1 | S | S | S | S | S | S | S |
| Multiple modes | 11.3 | 7.2 | 12.0 | 19.5 | 7.9 | 25.0 | 14.4 | 15.6 | 22.8 | 6.6 | 5.7 | 10.1 |
| Parcel, USPS or courier | 12.0 | 7.4 | 12.6 | 19.6 | 5.9 | 25.2 | 19.8 | 7.1 | 28.7 | 6.6 | 5.8 | 10.1 |
| Truck and rail | 48.7 | 14.2 | 49.4 | 48.5 | 28.7 | 45.5 | 33.5 | 32.3 | 26.0 | 24.2 | 24.2 | 39.4 |
| Other Multiple modes | 42.7 | S | S | 41.5 | S | S | S | S | S | 21.6 | 23.3 | 29.0 |
| Other and unknown modes | 21.1 | 4.2 | 21.9 | 38.1 | 7.1 | 117.5 | 16.1 | 27.0 | 12.8 | 27.4 | 14.0 | 25.9 |
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.