Table B-10. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group for State of Origin: 2002 and 1997
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 | 8.7 | 5.9 | 13.3 | 15.0 | 11.1 | 22.2 | 18.0 | 20.0 | 34.7 | 5.7 | 13.6 | 17.6 | |
| 01-05 | Agriculture products and fish | 23.1 | 11.1 | 23.2 | 20.9 | 20.7 | 22.9 | 18.3 | 21.5 | 24.8 | 30.3 | 14.0 | 65.6 |
| 06-09 | Grains, alcohol, and tobacco products | 23.6 | 12.9 | 30.3 | 32.2 | 16.6 | 25.2 | 45.3 | 35.5 | 24.4 | 17.7 | S | S |
| 10-14 | Stones, non-metallic minerals, and metallic ores | 34.4 | 28.2 | 33.7 | 22.2 | 17.1 | 32.7 | 34.2 | 14.4 | 52.0 | S | 10.9 | S |
| 15-19 | Coal and petroleum products | 16.6 | 22.6 | 41.0 | 11.1 | 21.3 | 28.3 | 17.4 | 25.0 | 47.4 | 30.2 | S | S |
| 20-24 | Pharmaceutical and chemical products | 17.7 | 17.2 | 28.0 | 49.4 | 24.5 | 113.6 | 25.8 | 11.7 | 34.9 | 25.5 | 13.3 | 21.4 |
| 25-30 | Logs, wood products, and textile and leather | 15.9 | 11.1 | 20.7 | S | 11.7 | S | S | 15.2 | S | 12.0 | 7.7 | 12.4 |
| 31-34 | Base metal and machinery | 13.5 | 9.7 | 18.9 | 36.7 | 21.2 | 61.5 | 28.1 | 10.1 | 32.5 | 12.7 | 16.4 | 36.3 |
| 35-38 | Electronic, motorized vehicles, and precision instruments | 17.4 | 12.2 | 26.4 | S | 26.8 | S | S | 20.2 | S | 8.5 | 11.4 | 10.9 |
| 39-43 | Furniture, mixed freight and misc manufactured products | 16.2 | 20.4 | 48.4 | 27.8 | 25.7 | 52.8 | 15.3 | 21.3 | 34.3 | 10.5 | 11.1 | 16.8 |
| -- | Commodity Unknown | 37.3 | 42.8 | 31.2 | 49.6 | 41.8 | 340.8 | S | S | S | 39.2 | 27.1 | 31.7 |
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.