Table B-5a. Estimated Measures of Reliability for Shipment Characteristics by Two-Digit Commodity for State of Origin: 2002

Table B-5a. Estimated Measures of Reliability for Shipment Characteristics by Two-Digit Commodity for State of Origin: 2002

[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]

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Commodity (2-digit SCTG) 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
All Commodities 5.7 6.4 11.7 8.3
01 Live animals and live fish S S S S S S 31.6
02 Cereal grains S S S S S S 31.6
03 Other agricultural products 43.8 0.2 S S S S S
04 Animal feed and products of animal origin, n.e.c. S S S S S S 22.8
05 Meat, fish, seafood, and their preparations 40.9 0.9 49.3 0.4 S S S
06 Milled grain products and preparations, and bakery products 23.6 0.4 25.9 0.3 19.4 0.5 19.6
07 Other prepared foodstuffs and fats and oils 17.4 1.1 20.1 1.2 18.2 0.6 42.9
08 Alcoholic beverages 42.2 0.1 41.3 S S 49.2
09 Tobacco products 35.9 0.3 34.2 32.0 S
10 Monumental or building stone 36.3 41.9 0.1 37.7 0.2 23.8
11 Natural sands S S S S 45.0 0.2 49.3
12 Gravel and crushed stone 25.7 24.9 3.7 19.9 0.6 8.5
13 Nonmetallic minerals n.e.c. 33.3 S S S S S
14 Metallic ores and concentrates S S S S S S 22.0
15 Coal 18.1 0.1 18.5 3.4 26.4 5.3 S
17 Gasoline and aviation turbine fuel 28.4 0.4 30.9 1.4 48.7 0.5 15.7
18 Fuel oils 42.8 0.3 44.1 1.1 34.0 0.1 17.5
19 Coal and petroleum products, n.e.c. 43.0 0.2 48.6 0.7 29.4 0.4 32.0
20 Basic chemicals 35.5 1.0 29.8 0.7 31.7 1.2 30.6
21 Pharmaceutical products 38.6 2.6 23.7 25.0 0.3 20.2
22 Fertilizers S S S S S S 49.6
23 Chemical products and preparations, n.e.c. 25.5 1.0 25.7 0.2 44.3 0.7 29.4
24 Plastics and rubber 32.4 1.6 22.5 0.4 17.6 0.7 12.9
25 Logs and other wood in the rough 48.0 S S 47.1 S
26 Wood products 16.7 0.3 34.3 1.0 22.3 0.6 13.1
27 Pulp, newsprint, paper, and paperboard 18.4 0.2 22.1 0.3 20.1 0.4 41.2
28 Paper or paperboard articles 13.2 0.3 16.8 0.2 29.9 0.6 45.1
29 Printed products 15.4 0.3 35.1 0.3 24.3 0.3 13.7
30 Textiles, leather, and articles of textiles or leather 23.1 1.3 18.4 17.3 0.1 6.7
31 Nonmetallic mineral products 7.5 0.2 31.1 1.5 18.2 0.7 17.5
32 Base metal in primary or semi finished forms and in finished basic shapes 10.4 0.7 12.4 0.8 9.1 1.4 17.2
33 Articles of base metal 16.1 0.5 21.4 0.2 25.4 0.9 17.2
34 Machinery 11.5 0.3 15.5 18.9 0.1 17.2
35 Electronic and other electrical equipment and components and office equipment 20.8 1.5 27.4 0.1 26.7 0.3 19.4
36 Motorized and other vehicles (including parts) 19.8 1.1 29.9 0.3 34.3 0.6 37.8
37 Transportation equipment, n.e.c. 34.8 0.4 48.1 40.9 0.1 18.5
38 Precision instruments and apparatus 36.8 0.9 S S 40.8 0.1 26.4
39 Furniture, mattresses and mattress supports, lamps, lighting fittings, and... 19.5 0.4 23.8 0.1 23.1 0.3 22.8
40 Miscellaneous manufactured products 11.4 0.5 17.0 0.1 20.5 0.2 16.9
41 Waste and scrap 45.0 0.2 S S S S 18.7
43 Mixed freight 7.4 0.9 11.5 0.6 17.6 0.5 39.6
-- Commodity unknown 40.5 46.3 0.2 S S 19.6

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 confidentially protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs. Coverage for the 2002 Commodity Flow Survey (CFS) differs from the previous surveys due to a change from the 1987 Standard Industrial Classification System to the 1997 North American Industry Classification System and other survey improvements. Therefore, data users are urged to use caution when comparing 2002 CFS estimates with estimates from prior years.

SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Individual State Data, December 2004.