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 8.3 10.4 11.0 9.4
01 Live animals and live fish
02 Cereal grains
03 Other agricultural products S S S S S S 23.4
04 Animal feed and products of animal origin, n.e.c. 46.6 0.3 S S 40.3 0.5 S
05 Meat, fish, seafood, and their preparations 31.2 0.7 44.3 0.5 45.3 0.8 S
06 Milled grain products and preparations, and bakery products 42.0 0.2 41.3 0.2 S S 27.7
07 Other prepared foodstuffs and fats and oils 34.2 1.8 32.5 1.4 26.3 0.9 19.6
08 Alcoholic beverages 31.5 0.3 32.1 0.3 38.0 26.1
09 Tobacco products S S S S S S 31.6
10 Monumental or building stone S S S S S S 31.6
11 Natural sands 47.6 30.5 0.2 40.8 0.1 23.7
12 Gravel and crushed stone 27.8 23.8 2.5 24.2 0.6 21.7
13 Nonmetallic minerals n.e.c. S S S S S S 25.7
14 Metallic ores and concentrates S S S S S S 31.6
15 Coal S S S S S S 31.6
17 Gasoline and aviation turbine fuel S S S S S S 16.6
18 Fuel oils 41.8 0.1 40.3 0.4 S S S
19 Coal and petroleum products, n.e.c. 37.5 0.2 34.0 0.2 S S S
20 Basic chemicals 34.5 0.5 25.1 0.5 42.6 0.8 17.2
21 Pharmaceutical products S S S S 43.4 0.1 16.9
22 Fertilizers S S S S S S S
23 Chemical products and preparations, n.e.c. 27.2 0.9 46.1 0.9 S S S
24 Plastics and rubber 13.3 1.5 16.3 0.8 18.5 2.3 22.1
25 Logs and other wood in the rough S S S S S S 24.4
26 Wood products S S 31.4 2.1 37.5 2.5 16.3
27 Pulp, newsprint, paper, and paperboard S S 45.8 2.4 S S 13.6
28 Paper or paperboard articles 33.6 0.8 33.1 0.3 27.8 0.4 27.0
29 Printed products 40.6 0.5 29.8 29.5 0.1 11.3
30 Textiles, leather, and articles of textiles or leather 11.7 1.7 30.0 0.9 23.3 2.1 4.5
31 Nonmetallic mineral products 24.6 0.8 39.0 5.2 19.3 1.4 S
32 Base metal in primary or semi finished forms and in finished basic shapes 13.2 0.4 21.6 1.3 19.2 2.0 11.2
33 Articles of base metal 41.9 0.8 41.8 0.6 S S 19.5
34 Machinery 20.9 1.2 40.6 0.3 38.8 0.9 25.5
35 Electronic and other electrical equipment and components and office equipment 17.7 1.5 17.3 0.1 26.9 0.5 16.2
36 Motorized and other vehicles (including parts) 26.7 1.6 19.6 0.3 17.9 0.7 38.5
37 Transportation equipment, n.e.c. S S S S S S 27.6
38 Precision instruments and apparatus 30.4 0.4 32.1 30.1 0.1 19.5
39 Furniture, mattresses and mattress supports, lamps, lighting fittings, and... S S S S S S S
40 Miscellaneous manufactured products 23.8 0.3 30.8 0.2 25.8 0.3 13.2
41 Waste and scrap S S S S S S 35.0
43 Mixed freight 38.7 2.7 18.3 0.6 17.8 0.4 S
-- Commodity unknown 47.4 44.1 S S 24.3

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.