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 | 4.5 | 5.7 | 9.2 | 10.2 | 5.7 | 15.8 | 9.8 | 9.5 | 20.2 | 8.6 | 11.6 | 13.5 |
| Single modes | 5.4 | 5.9 | 10.3 | 10.7 | 5.8 | 16.5 | 10.0 | 9.4 | 19.7 | 13.9 | 7.3 | 16.5 |
| Truck | 4.3 | 3.2 | 7.3 | 13.4 | 8.9 | 20.7 | 14.5 | 5.4 | 24.4 | 12.3 | 4.5 | 16.1 |
| Rail | 39.1 | 38.2 | 58.6 | 17.3 | 18.6 | 55.4 | 17.7 | 22.9 | 51.4 | 8.8 | 8.4 | 9.6 |
| Water | 33.8 | 36.3 | 45.6 | S | 20.1 | S | 35.9 | 22.2 | 38.7 | S | 10.2 | S |
| Air (including truck and air) | 28.7 | 15.6 | 25.6 | 29.3 | 27.4 | 50.0 | 34.9 | 25.3 | 65.3 | 5.7 | 2.1 | 6.3 |
| Pipeline | S | 42.1 | S | S | 41.8 | S | S | S | S | S | S | S |
| Multiple modes | 6.3 | 14.9 | 18.0 | 48.5 | 28.2 | 136.7 | 34.2 | 28.1 | 105.7 | 4.8 | 9.3 | 10.5 |
| Parcel, USPS or courier | 8.3 | 13.8 | 18.6 | 22.4 | 21.1 | 46.2 | 31.3 | 34.7 | 78.4 | 4.8 | 9.3 | 10.6 |
| Truck and rail | 32.2 | 31.9 | 25.2 | 40.3 | 33.7 | 42.2 | 36.9 | 28.5 | 52.4 | 15.6 | 5.6 | 23.2 |
| Other Multiple modes | 34.6 | S | S | S | 49.3 | S | S | S | S | S | 39.4 | S |
| Other and unknown modes | 26.8 | 14.4 | 26.9 | 40.3 | 15.2 | 27.9 | 46.0 | 15.2 | 93.2 | 34.1 | 22.6 | 141.8 |
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.