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 | 13.3 | 6.5 | 23.4 | 10.4 | 10.5 | 12.8 | 16.3 | 14.2 | 29.7 | 14.8 | 8.1 | 29.0 | |
| 01-05 | Agriculture products and fish | 22.9 | 23.3 | 50.8 | 27.7 | 25.4 | 57.5 | 28.8 | 25.0 | 81.8 | 15.3 | S | S |
| 06-09 | Grains, alcohol, and tobacco products | 24.0 | 12.2 | 27.7 | 24.7 | 13.8 | 26.6 | 29.8 | 25.5 | 29.9 | 22.3 | 20.9 | 22.5 |
| 10-14 | Stones, non-metallic minerals, and metallic ores | 17.9 | 37.0 | 20.6 | 32.4 | 19.6 | 24.4 | 19.8 | 22.8 | 36.0 | S | 28.9 | S |
| 15-19 | Coal and petroleum products | 16.9 | 23.5 | 41.0 | 19.9 | 25.2 | 37.3 | 40.1 | 35.4 | 192.8 | S | 15.5 | S |
| 20-24 | Pharmaceutical and chemical products | 10.7 | 8.6 | 20.3 | 18.3 | 10.9 | 39.1 | 14.1 | 35.5 | 40.0 | S | 16.8 | S |
| 25-30 | Logs, wood products, and textile and leather | 34.4 | 20.2 | 78.3 | 12.6 | 21.7 | 20.4 | 16.8 | 23.9 | 23.5 | 15.2 | 9.3 | 25.6 |
| 31-34 | Base metal and machinery | 15.5 | 6.7 | 18.7 | 23.4 | 38.7 | 7.9 | 33.2 | 8.6 | 31.1 | 19.8 | 10.7 | 32.2 |
| 35-38 | Electronic, motorized vehicles, and precision instruments | 43.9 | 8.5 | 90.5 | 43.1 | 12.2 | 38.1 | 11.3 | 11.3 | 10.6 | 21.7 | 24.6 | 78.2 |
| 39-43 | Furniture, mixed freight and misc manufactured products | 19.3 | 22.4 | 48.5 | 17.2 | 10.6 | 26.8 | 15.3 | 9.5 | 21.7 | 22.1 | 14.1 | 25.5 |
| -- | Commodity Unknown | 39.7 | S | S | 47.2 | 44.8 | 8.6 | S | 33.1 | S | 35.2 | 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.