Table B-5a. Estimated Measures of Reliability for Export Shipment Characteristics by Commodity Group: 2002

Table B-5a. Estimated Measures of Reliability for Export Shipment Characteristics by Commodity Group: 2002

[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]

Excel | CSV

SCTG code Description Value Tons
CV 02 Std. error of percent CV 02 Std. error of percent
  All Commodities 4.9 11.8
01-05 Agriculture products and fish 14.1 0.9 17.4 3.9
06-09 Grains, alcohol, and tobacco products 18.3 0.3 13.8 0.6
10-14 Stones, nonmetallic minerals, and metallic ores. 16.9 0.1 23.9 1.9
15-19 Coal and petroleum products 31.2 0.3 24.2 2.7
20-24 Pharmaceutical and chemical products 7.2 0.9 23.2 1.6
25-30 Logs, wood products, and textile and leather 7.3 0.5 11.0 0.8
31-34 Base metal and machinery 7.0 1.3 12.4 1.0
35-38 Electronic, motorized vehicles, and precision instruments 8.5 2.2 10.1 0.6
39-43 Furniture, mixed freight and misc. manufactured products 8.2 0.6 15.4 0.5
-- Commodity unknown 32.1 0.1 S S

KEY:
– Represents an estimate 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 on 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: Research and Innovative Technologies Administration, Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Export Data, March 2005.