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]
|CV 02||Std. error of percent||CV 02||Std. error of percent|
|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|
– 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.