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 3.4 10.5 3.1 8.2
01 Live animals and live fish S S S S S S 23.9
02 Cereal grains 20.3 0.2 20.2 1.5 9.4 2.3 S
03 Other agricultural products 16.4 0.2 24.8 1.0 13.9 1.0 32.6
04 Animal feed and products of animal origin, n.e.c. 31.7 0.2 30.1 0.4 36.6 0.7 25.6
05 Meat, fish, seafood, and their preparations 41.5 0.7 36.9 0.1 32.7 0.2 31.3
06 Milled grain products and preparations, and bakery products 24.9 0.4 30.8 0.5 21.8 0.7 25.2
07 Other prepared foodstuffs and fats and oils 15.5 0.8 15.7 0.5 11.3 1.0 S
08 Alcoholic beverages 19.3 0.3 15.9 0.2 24.0 0.2 15.9
09 Tobacco products 31.2 0.1 38.5 48.1 33.5
10 Monumental or building stone S S S S S S S
11 Natural sands 29.0 34.2 0.7 31.8 0.5 S
12 Gravel and crushed stone S S S S S S 32.6
13 Nonmetallic minerals n.e.c. 17.2 32.3 0.8 20.3 38.5
14 Metallic ores and concentrates S S S S S S 23.9
15 Coal 14.9 16.6 1.2 30.3 0.9 19.4
17 Gasoline and aviation turbine fuel 24.7 0.9 22.5 1.6 S S 21.9
18 Fuel oils 25.0 0.3 23.9 0.9 29.6 0.4 33.2
19 Coal and petroleum products, n.e.c. 16.9 0.2 29.0 1.3 S S S
20 Basic chemicals 25.0 0.1 18.6 0.1 8.8 41.5
21 Pharmaceutical products 36.8 2.2 48.0 S S 20.7
22 Fertilizers 44.6 0.3 49.7 1.7 S S S
23 Chemical products and preparations, n.e.c. 31.0 1.3 47.2 0.7 S S 25.3
24 Plastics and rubber 12.0 0.5 12.9 0.2 14.8 0.5 16.5
25 Logs and other wood in the rough S S S S S S 26.0
26 Wood products 12.5 37.3 0.3 40.5 19.8
27 Pulp, newsprint, paper, and paperboard 38.0 0.5 45.7 0.3 39.7 0.3 24.5
28 Paper or paperboard articles 28.5 0.4 32.4 0.2 38.9 0.3 16.7
29 Printed products 12.4 0.2 14.9 14.4 9.7
30 Textiles, leather, and articles of textiles or leather 14.8 0.2 23.2 20.8 11.5
31 Nonmetallic mineral products 21.5 0.3 32.2 2.2 23.8 0.5 33.6
32 Base metal in primary or semi finished forms and in finished basic shapes 30.6 1.1 39.9 1.3 26.4 1.2 20.5
33 Articles of base metal 17.2 0.7 42.9 1.1 33.6 0.8 17.0
34 Machinery 12.6 0.7 19.7 0.1 22.4 0.3 15.1
35 Electronic and other electrical equipment and components and office equipment 18.3 2.2 49.5 0.1 20.7 0.1 10.5
36 Motorized and other vehicles (including parts) 11.9 0.9 15.2 0.1 21.2 0.2 8.3
37 Transportation equipment, n.e.c. S S S S S S 20.5
38 Precision instruments and apparatus 31.9 0.3 S S 37.3 9.8
39 Furniture, mattresses and mattress supports, lamps, lighting fittings, and... 31.7 0.2 34.3 34.6 18.1
40 Miscellaneous manufactured products 16.7 0.8 49.1 0.8 28.3 0.6 7.3
41 Waste and scrap S S S S S S S
43 Mixed freight 21.6 2.9 36.2 1.2 28.1 1.2 15.0
-- Commodity unknown 23.7 S S S S 26.4

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.