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 | 9.2 | 5.8 | 13.4 | 14.7 | 10.6 | 19.5 | S | 18.3 | S | 46.8 | 20.3 | 65.6 |
| Single modes | 12.9 | 6.2 | 18.3 | 12.0 | 11.4 | 15.8 | 21.7 | 30.8 | 30.7 | 28.2 | 42.1 | 31.7 |
| Truck | 11.3 | 6.2 | 15.0 | 8.4 | 16.5 | 17.9 | 5.9 | 14.2 | 12.8 | 12.6 | 5.1 | 17.9 |
| Rail | – | – | – | – | – | – | – | – | – | – | – | – |
| Water | S | 32.5 | S | 38.1 | S | S | 48.7 | S | S | 18.8 | 21.8 | 57.9 |
| Air (including truck and air) | 27.4 | 15.2 | 32.0 | 32.8 | 22.3 | 12.1 | 20.4 | 33.3 | 11.9 | 24.3 | 19.0 | 15.1 |
| Pipeline | 23.0 | 19.7 | 33.3 | 21.1 | 19.3 | 27.6 | S | S | S | S | S | S |
| Multiple modes | 12.4 | 13.5 | 21.1 | 38.8 | 36.5 | 150.6 | S | 32.1 | S | 21.6 | 13.4 | 51.3 |
| Parcel, USPS or courier | 27.0 | 15.3 | 46.6 | 17.2 | 17.6 | 49.3 | 31.6 | 19.2 | 88.2 | 18.4 | 14.1 | 52.8 |
| Truck and rail | – | – | – | – | – | – | – | – | – | – | – | – |
| Other Multiple modes | 11.5 | 18.9 | 22.2 | 39.0 | 36.8 | 152.0 | S | 32.2 | S | 28.1 | 20.4 | 76.6 |
| Other and unknown modes | 22.7 | 17.6 | 23.7 | 34.4 | 36.4 | 38.6 | 36.0 | 32.2 | 10.6 | S | 16.2 | 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.