Table B-5a. Estimated Measures of Reliability for Shipment Characteristics by Two-Digit Commodity for the United States: 2002

Table B-5a. Estimated Measures of Reliability for Shipment Characteristics by Two-Digit Commodity for the United States: 2002

[Estimates are based on data from the 2002 Commodity Flow Survey]

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SCTG code Commodity description (2-digit) Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
  Total 1.3 2.0 3.7 2.9
01 Live animals and live fish 21.1 24.5 26.0 18.3
02 Cereal grains 7.1 7.5 0.4 18.1 1.3 10.9
03 Other agricultural products 10.4 0.2 7.8 0.2 7.4 0.3 12.2
04 Animal feed and products of animal origin, n.e.c. 9.6 - 14.1 0.3 10.0 0.2 24.8
05 Meat, fish, seafood, and their preparations 4.2 0.1 4.6 6.5 0.1 15.2
06
Milled grain products and preparations, and
bakery products
8.2 0.1 7.2 6.8 0.1 19.1
07 Other prepared foodstuffs and fats and oils 4.4 0.2 5.2 0.2 6.3 0.4 17.7
08 Alcoholic beverages 6.1 5.8 12.8 0.1 4.7
09 Tobacco products 14.4 0.1 29.9 36.3 22.1
10 Monumental or building stone 29.1 29.9 22.1 16.9
11 Natural sands 6.8 9.1 0.4 11.8 0.1 10.5
12 Gravel and crushed stone 6.7 9.0 1.2 10.5 0.3 7.6
13 Nonmetallic minerals n.e.c. 11.5 11.9 0.2 18.7 0.3 15.9
14 Metallic ores and concentrates 14.0 12.4 0.1 18.1 0.3 7.9
15 Coal 8.0 8.8 0.8 16.8 2.4 8.4
17 Gasoline and aviation turbine fuel 4.4 0.2 5.0 0.5 9.8 0.4 10.1
18 Fuel oils 6.0 6.0 0.3 10.1 0.2 13.5
19 Coal and petroleum products, n.e.c. 7.5 10.2 0.4 11.1 0.3 24.7
20 Basic chemicals 7.7 0.1 12.6 0.4 10.8 0.4 15.3
21 Pharmaceutical products 9.5 0.5 16.7 21.0 5.7
22 Fertilizers 16.9 - 30.2 0.7 24.7 0.7 28.4
23 Chemical products and preparations, n.e.c. 5.0 0.1 5.1 7.9 0.1 7.2
24 Plastics and rubber 3.6 0.1 4.0 5.2 0.2 6.1
25 Logs and other wood in the rough 24.2 S S 34.4 S
26 Wood products 8.4 0.2 9.2 0.2 11.7 0.5 10.5
27 Pulp, newsprint, paper, and paperboard 5.2 6.2 7.4 0.2 10.4
28 Paper or paperboard articles 4.0 5.2 8.5 9.5
29 Printed products 7.6 0.1 8.1 8.5 3.9
30 Textiles, leather, and articles of textiles or leather 5.4 0.3 7.5 10.5 0.1 2.4
31 Nonmetallic mineral products 7.0 0.1 9.0 0.7 11.9 0.5 9.5
32
Base metal in primary or semifinished forms and
in finished basic shapes
5.0 0.2 6.3 0.2 6.0 0.3 10.2
33 Articles of base metal 3.9 0.1 9.5 7.0 0.1 5.6
34 Machinery 5.7 0.3 7.7 9.0 0.1 6.6
35
Electronic and other electrical equipment
and components and office equipment
5.6 0.5 9.7 11.9 0.1 4.9
36 Motorized and other vehicles (including parts) 8.3 0.6 7.6 10.1 0.2 12.3
37 Transportation equipment, n.e.c. 23.3 0.4 40.9 41.7 0.2 5.0
38 Precision instruments and apparatus 7.9 0.2 18.3 12.6 8.0
39
Furniture, mattresses and mattress supports,
lamps, lighting fittings, and...
6.2 0.1 11.8 6.4 6.2
40 Miscellaneous manufactured products 5.4 0.2 10.5 7.7 4.3
41 Waste and scrap 14.4 16.8 0.3 25.8 0.4 10.5
43 Mixed freight 3.6 0.4 5.6 0.1 5.0 0.1 7.9
-- Commodity unknown 9.9 22.3 41.7 0.1 8.8

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.

NOTES: 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: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, United States Data, December 2004.