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 | 5.2 | 3.8 | 7.9 | 9.1 | 12.7 | 15.4 | 14.0 | 5.4 | 22.8 | 9.5 | 4.7 | 12.6 | |
01-05 | Agriculture products and fish | 16.0 | 8.4 | 21.3 | 33.7 | 12.9 | 82.1 | S | 21.9 | S | 35.2 | 25.4 | 26.6 |
06-09 | Grains, alcohol, and tobacco products | 10.0 | 3.4 | 13.1 | 17.6 | 7.5 | 23.9 | 23.3 | 10.8 | 28.8 | 30.3 | 24.1 | 28.5 |
10-14 | Stones, non-metallic minerals, and metallic ores | 25.4 | 16.8 | 30.8 | 11.5 | 27.8 | 22.4 | 30.9 | 26.3 | 125.4 | 37.4 | 22.2 | 96.1 |
15-19 | Coal and petroleum products | 24.6 | 36.2 | 17.5 | 24.9 | 35.1 | 16.5 | 27.7 | 32.4 | 82.7 | 35.6 | 16.9 | 127.0 |
20-24 | Pharmaceutical and chemical products | 12.2 | 8.3 | 16.0 | 30.2 | 11.1 | 68.6 | 24.6 | 11.5 | 65.4 | 11.5 | 13.9 | 12.4 |
25-30 | Logs, wood products, and textile and leather | 8.1 | 6.2 | 12.6 | 10.9 | 11.6 | 13.1 | 10.0 | 14.6 | 12.5 | 6.5 | 4.8 | 9.4 |
31-34 | Base metal and machinery | 9.5 | 4.2 | 9.6 | 49.9 | 11.9 | 44.7 | 10.8 | 15.7 | 16.2 | 18.5 | 11.0 | 16.1 |
35-38 | Electronic, motorized vehicles, and precision instruments | 24.2 | 11.1 | 30.5 | 39.5 | 13.1 | 69.8 | 20.7 | 15.7 | 33.5 | 15.0 | 15.3 | 21.7 |
39-43 | Furniture, mixed freight and misc manufactured products | 5.8 | 6.4 | 20.7 | 15.1 | 10.7 | 27.9 | 10.8 | 15.1 | 21.5 | 7.5 | 7.7 | 10.9 |
-- | Commodity Unknown | 41.6 | 35.2 | 49.4 | 46.6 | S | S | 48.3 | 39.4 | 21.9 | 35.6 | 22.9 | 20.0 |
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.