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 | 6.9 | 8.6 | 13.8 | 8.1 | 10.6 | 13.4 | 12.4 | 34.2 | 26.9 | 15.1 | 13.6 | 26.3 |
| Single modes | 6.8 | 10.0 | 14.1 | 12.8 | 15.3 | 20.5 | 13.5 | 35.6 | 27.7 | 14.6 | 18.3 | 19.9 |
| Truck | 7.2 | 5.7 | 12.2 | 13.9 | 12.1 | 27.5 | 18.4 | 16.9 | 27.5 | 13.9 | 9.8 | 18.9 |
| Rail | 13.4 | 29.7 | 26.0 | 16.5 | 33.3 | 24.0 | 13.2 | 43.2 | 29.7 | 6.8 | 14.2 | 17.7 |
| Water | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
| Air (including truck and air) | 32.7 | 28.0 | 45.5 | S | 29.5 | S | S | 31.7 | S | 15.7 | 15.0 | 18.2 |
| Pipeline | S | S | S | S | S | S | S | S | S | S | S | S |
| Multiple modes | 14.3 | 13.4 | 31.5 | S | 21.1 | S | S | 24.6 | S | 14.1 | 8.9 | 17.1 |
| Parcel, USPS or courier | 14.2 | 12.9 | 32.3 | 26.0 | 13.4 | 58.9 | 27.8 | 20.3 | 66.5 | 14.1 | 9.0 | 17.1 |
| Truck and rail | S | 36.7 | S | S | 27.0 | S | S | 28.0 | S | 30.4 | 16.3 | 42.8 |
| Other Multiple modes | S | – | S | S | – | S | S | – | S | 26.3 | – | – |
| Other and unknown modes | 30.2 | 18.3 | 88.4 | 17.3 | 26.3 | 30.5 | 16.2 | 36.9 | 27.7 | 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.