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]

Excel | CSV

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 5.4 3.5 7.8 7.8 8.5 10.4 9.4 3.4 9.9 7.7 13.0 15.2
01-05 Agriculture products and fish 23.9 10.3 18.2 41.8 11.4 39.9 S 15.4 S 31.7 24.1 15.1
06-09 Grains, alcohol, and tobacco products 11.9 4.8 13.5 39.1 5.0 64.5 20.9 13.5 31.5 19.6 9.8 75.4
10-14 Stones, non-metallic minerals, and metallic ores 30.9 9.0 52.0 16.3 12.2 16.8 26.0 13.4 30.7 32.1 13.6 48.1
15-19 Coal and petroleum products 14.8 39.2 42.9 18.6 26.9 33.4 47.3 27.2 64.3 18.9 17.2 18.3
20-24 Pharmaceutical and chemical products 18.5 5.2 30.7 23.9 10.7 27.8 32.8 12.5 45.2 8.0 13.9 37.3
25-30 Logs, wood products, and textile and leather 25.7 6.4 30.5 10.1 5.4 9.9 11.3 8.3 14.7 6.6 15.1 20.5
31-34 Base metal and machinery 8.1 7.2 11.7 7.5 21.0 13.5 15.0 10.9 13.8 17.0 8.0 22.2
35-38 Electronic, motorized vehicles, and precision instruments 9.1 4.9 12.9 11.2 11.4 14.8 15.5 10.6 18.5 15.8 15.1 39.0
39-43 Furniture, mixed freight and misc manufactured products 17.5 8.5 28.6 27.5 10.2 44.1 20.0 8.4 26.0 15.7 8.7 19.5
-- Commodity Unknown 29.8 24.8 54.4 38.8 36.9 32.4 39.0 S S 42.2 23.2 33.0

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.