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 16.2 4.6 25.4 9.4 13.9 15.6 14.7 15.9 21.3 9.0 11.8 33.0
01-05 Agriculture products and fish 20.2 21.1 23.0 37.1 18.3 28.4 48.0 28.4 53.7 39.4 S S
06-09 Grains, alcohol, and tobacco products 10.0 18.6 13.5 13.0 12.2 16.5 15.1 20.8 22.7 33.3 16.2 92.4
10-14 Stones, non-metallic minerals, and metallic ores 16.7 25.6 22.3 14.5 32.0 27.6 38.2 28.8 30.9 29.2 36.6 67.9
15-19 Coal and petroleum products 19.3 10.3 26.4 16.3 16.0 20.7 23.5 23.3 29.7 37.7 21.1 20.3
20-24 Pharmaceutical and chemical products 16.3 11.6 38.9 18.4 9.1 34.1 19.2 10.5 34.9 13.5 6.5 26.6
25-30 Logs, wood products, and textile and leather 25.0 6.2 45.9 19.7 13.8 31.8 17.0 7.1 31.7 8.8 13.6 37.3
31-34 Base metal and machinery 48.4 5.9 136.7 24.2 13.3 31.9 35.4 7.3 66.6 11.9 9.2 20.7
35-38 Electronic, motorized vehicles, and precision instruments 26.4 9.2 29.7 23.5 11.4 32.9 17.8 14.6 20.7 10.8 16.9 40.3
39-43 Furniture, mixed freight and misc manufactured products 17.8 11.5 56.3 17.7 21.3 38.2 17.2 30.7 43.0 12.7 11.3 26.3
-- Commodity Unknown 32.7 39.9 105.4 S 32.8 S 33.9 S S S 29.0 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.