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 | 5.7 | 8.0 | 11.7 | 6.4 | 8.4 | 7.7 | 11.7 | 8.4 | 17.0 | 8.3 | 11.6 | 11.5 | |
01-05 | Agriculture products and fish | 27.1 | 16.8 | 29.8 | 31.8 | 19.3 | 22.6 | S | 13.2 | S | 31.2 | 28.1 | 40.3 |
06-09 | Grains, alcohol, and tobacco products | 13.5 | 7.6 | 16.1 | 16.7 | 6.7 | 20.5 | 13.1 | 6.1 | 12.7 | 30.8 | 35.8 | 44.6 |
10-14 | Stones, non-metallic minerals, and metallic ores | 16.3 | 16.3 | 15.6 | 19.3 | 13.0 | 16.9 | S | 22.8 | S | 10.0 | 28.9 | 21.1 |
15-19 | Coal and petroleum products | 21.3 | 10.4 | 15.9 | 13.8 | 10.2 | 11.8 | 24.1 | 20.4 | 44.3 | 38.4 | 13.7 | 168.3 |
20-24 | Pharmaceutical and chemical products | 15.9 | 8.0 | 39.1 | 18.0 | 17.5 | 35.5 | 20.1 | 18.9 | 37.4 | 12.7 | 8.2 | 15.1 |
25-30 | Logs, wood products, and textile and leather | 11.3 | 27.4 | 25.9 | 18.2 | 6.7 | 19.1 | 9.0 | 16.9 | 14.7 | 8.7 | 12.0 | 18.4 |
31-34 | Base metal and machinery | 4.2 | 3.1 | 4.5 | 16.8 | 23.6 | 15.4 | 7.2 | 6.9 | 7.6 | 13.8 | 20.0 | 18.3 |
35-38 | Electronic, motorized vehicles, and precision instruments | 8.5 | 11.6 | 17.2 | 19.7 | 12.3 | 29.7 | 14.0 | 21.4 | 19.9 | 14.5 | 16.0 | 13.4 |
39-43 | Furniture, mixed freight and misc manufactured products | 4.0 | 4.8 | 10.7 | 22.1 | S | S | S | 36.9 | S | 19.5 | 11.5 | 6.9 |
-- | Commodity Unknown | 40.5 | 16.8 | 51.5 | 46.3 | 46.5 | 185.8 | S | 36.5 | S | 19.6 | 15.2 | 20.6 |
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.