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 13.8 5.4 20.2 10.3 6.5 13.8 6.4 6.4 10.3 14.3 8.1 15.3
01-05 Agriculture products and fish 14.0 11.0 22.6 34.3 13.7 38.3 13.4 20.0 14.3 S 16.3 S
06-09 Grains, alcohol, and tobacco products 21.1 14.2 33.7 43.5 14.7 86.7 35.1 15.3 64.0 18.3 47.9 67.9
10-14 Stones, non-metallic minerals, and metallic ores 17.5 16.9 28.0 14.4 19.6 21.8 10.6 22.9 27.7 26.4 25.7 44.5
15-19 Coal and petroleum products 22.3 14.6 32.1 14.6 15.2 26.3 17.1 27.2 38.3 34.1 28.3 42.2
20-24 Pharmaceutical and chemical products 16.7 9.9 29.0 28.7 24.4 47.1 19.5 17.8 32.2 35.8 11.7 27.4
25-30 Logs, wood products, and textile and leather 11.4 12.1 16.5 14.9 13.0 16.3 27.4 14.3 24.3 18.5 10.7 19.0
31-34 Base metal and machinery 11.7 5.6 14.5 44.5 12.7 69.6 23.9 16.2 34.5 17.5 13.9 21.2
35-38 Electronic, motorized vehicles, and precision instruments 39.0 20.6 75.2 34.6 16.9 98.4 S 25.8 S 22.0 13.3 25.7
39-43 Furniture, mixed freight and misc manufactured products 13.5 9.8 26.1 43.6 17.2 62.8 19.3 12.5 27.7 18.5 8.9 17.0
-- Commodity Unknown 26.8 37.1 12.7 44.3 S S S S S 23.9 20.7 19.3

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.