Table B-6. Estimated Measures of Reliability for Export Shipment Characteristics by Two-Digit Commodity: 2002

Table B-6. Estimated Measures of Reliability for Export Shipment Characteristics by Two-Digit Commodity: 2002

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

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SCTG code Commodity description Value Tons
CV 02 Std. error of percent CV 02 Std. error of percent
  All Commodities 4.9 11.8
01 Live animals and live fish S S S S
02 Cereal grains 18.2 0.4 18.9 2.9
03 Other agricultural products 25.4 0.8 24.4 2.4
04 Animal feed and products of animal origin, nec 15.8 0.1 24.5 0.7
05 Meat, fish, seafood, and their preparations 19.4 0.2 24.2 0.2
06 Milled grain products and preparations, and bakery products 14.1 25.0 0.3
07 Other prepared foodstuffs and fats and oils 16.5 0.2 16.1 0.4
08 Alcoholic beverages 24.2 22.3
09 Tobacco products S S S S
10 Monumental or building stone S S S S
11 Natural sands 13.4 14.7
12 Gravel and crushed stone. 19.6 30.9 0.7
13 Nonmetallic minerals n.e.c 22.0 20.5 0.5
14 Metallic ores and concentrates 24.2 0.1 41.1 1.1
15 Coal 26.8 23.3 0.9
17 Gasoline and aviation turbine fuel 31.9 34.4 0.4
18 Fuel oils S S S S
19 Coal and petroleum products, n.e.c. 41.3 0.3 29.1 0.6
20 Basic chemicals 16.0 0.5 27.0 0.9
21 Pharmaceutical products 15.3 0.4 25.3
22 Fertilizers 36.5 0.1 S S
23 Chemical products and preparations, n.e.c 15.5 0.3 18.0 0.2
24 Plastics and rubber 6.9 0.3 17.4 0.6
25 Logs and other wood in the rough. 38.4 0.1 44.9 0.2
26 Wood products 14.2 0.1 20.9 0.3
27 Pulp, newsprint, paper, and paperboard 13.2 0.2 17.8 0.8
28 Paper or paperboard articles 18.2 0.1 21.9
29 Printed products 23.2 0.1 19.8
30 Textiles, leather, and articles of textiles or leather 12.5 0.3 13.9 0.1
31 Nonmetallic mineral products 27.0 0.3 26.1 0.3
32 Base metal in primary or semifinished forms and in finished basic shapes 11.9 0.3 25.2 0.7
33 Articles of base metal 14.2 0.3 35.3 0.5
34 Machinery 9.4 1.1 13.6 0.2
35 Electronic and other electrical equipment and components and office equipment 13.9 2.0 6.9 0.1
36 Motorized and other vehicles (including parts) 15.9 1.7 14.1 0.5
37 Transportation equipment, n.e.c 25.9 1.3 36.2
38 Precision instruments and apparatus 21.1 1.3 14.9
39 Furniture, mattresses and mattress supports, lamps, lighting fittings 17.2 19.6
40 Miscellaneous manufactured products 11.5 0.5 20.4 0.2
41 Waste and scrap 21.5 0.2 24.3 0.5
43 Mixed freight 14.6 0.2 15.9
-- 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.