Table B-10. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group for State of Origin: 2002 and 1997
Monday, July 2, 2012
Table B-10. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group 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]
| Code | Commodity (2-digit SCTG) | 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 Commodities | 6.0 | 5.1 | 10.1 | 9.6 | 10.6 | 14.8 | 15.8 | 6.4 | 23.4 | 14.8 | 5.0 | 19.6 | |
| 01-05 | Agriculture products and fish | 20.6 | 10.8 | 22.5 | 39.6 | 22.8 | 43.1 | 42.3 | 16.4 | 92.9 | S | 24.5 | S |
| 06-09 | Grains, alcohol, and tobacco products | 12.9 | 13.9 | 40.3 | 19.3 | 19.5 | 61.7 | 21.9 | 20.9 | 61.9 | S | 30.3 | S |
| 10-14 | Stones, non-metallic minerals, and metallic ores | 20.3 | S | S | 21.9 | 35.8 | 38.5 | 34.3 | 20.4 | 51.7 | 17.0 | 27.4 | 32.5 |
| 15-19 | Coal and petroleum products | 16.5 | 13.9 | 22.9 | 13.1 | 10.1 | 13.9 | 13.9 | 15.2 | 14.4 | 18.3 | 14.3 | 22.0 |
| 20-24 | Pharmaceutical and chemical products | 9.8 | 8.8 | 20.3 | 27.4 | 23.7 | 55.7 | 38.6 | 24.7 | 92.0 | 14.0 | 14.3 | 37.2 |
| 25-30 | Logs, wood products, and textile and leather | 28.3 | 9.4 | 37.8 | 24.5 | 15.9 | 26.9 | 12.9 | 14.5 | 16.7 | 10.2 | 11.3 | 15.1 |
| 31-34 | Base metal and machinery | 25.1 | 3.3 | 28.2 | 34.3 | 4.9 | 42.6 | 47.7 | 11.2 | 93.5 | 15.2 | 8.4 | 22.8 |
| 35-38 | Electronic, motorized vehicles, and precision instruments | 12.1 | 11.7 | 19.0 | 16.8 | 11.1 | 27.9 | 18.5 | 13.5 | 27.0 | 36.2 | 13.3 | 22.1 |
| 39-43 | Furniture, mixed freight and misc manufactured products | 12.3 | 18.6 | 33.4 | 21.3 | 12.2 | 28.0 | 11.8 | 12.5 | 16.5 | 10.1 | 9.5 | 18.3 |
| -- | Commodity Unknown | 47.3 | S | S | 41.6 | S | S | S | S | S | 23.8 | 36.9 | 93.8 |
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.