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 8.7 22.1 10.0 17.6
01 Live animals and live fish S S S S S S 31.6
02 Cereal grains 34.4 35.6 1.1 32.9 0.2 S
03 Other agricultural products 38.6 0.1 37.7 0.5 49.0 0.5 31.5
04 Animal feed and products of animal origin, n.e.c. S S S S S S 29.2
05 Meat, fish, seafood, and their preparations 27.6 1.8 22.4 1.4 21.0 1.9 34.5
06 Milled grain products and preparations, and bakery products S S S S S S 24.4
07 Other prepared foodstuffs and fats and oils 15.0 0.4 27.2 1.5 33.6 3.6 27.1
08 Alcoholic beverages 13.3 0.4 25.8 0.5 30.9 16.4
09 Tobacco products S S S S S S 28.7
10 Monumental or building stone
11 Natural sands 37.7 38.5 1.1 33.2 0.5 17.3
12 Gravel and crushed stone 48.6 S S 39.4 0.2 40.3
13 Nonmetallic minerals n.e.c. S S S S S S 36.3
14 Metallic ores and concentrates
15 Coal
17 Gasoline and aviation turbine fuel 34.5 3.8 33.0 7.0 29.9 2.2 18.3
18 Fuel oils 44.3 1.3 44.0 2.4 49.1 1.1 17.0
19 Coal and petroleum products, n.e.c. 25.1 0.2 28.1 2.6 35.8 1.9 36.2
20 Basic chemicals 34.4 1.0 32.4 1.5 S S S
21 Pharmaceutical products 40.7 6.7 26.2 28.8 19.8
22 Fertilizers S S 43.9 0.2 38.7 38.8
23 Chemical products and preparations, n.e.c. 45.0 1.0 S S S S 37.3
24 Plastics and rubber 14.7 1.5 23.9 0.9 22.5 2.4 24.6
25 Logs and other wood in the rough S S S S S S 30.7
26 Wood products 32.7 0.2 33.5 0.6 S S S
27 Pulp, newsprint, paper, and paperboard 36.4 28.8 35.0 S
28 Paper or paperboard articles 43.3 1.0 41.4 1.5 S S S
29 Printed products S S 45.7 S S 22.4
30 Textiles, leather, and articles of textiles or leather 16.4 0.1 12.9 29.2 14.0
31 Nonmetallic mineral products 44.5 0.6 S S 37.6 0.8 35.5
32 Base metal in primary or semi finished forms and in finished basic shapes 19.0 0.3 19.6 1.3 36.3 3.1 37.5
33 Articles of base metal 27.3 0.3 S S S S 39.8
34 Machinery 26.7 0.5 30.2 S S 26.3
35 Electronic and other electrical equipment and components and office equipment 20.2 0.8 30.6 0.3 39.1 0.5 23.2
36 Motorized and other vehicles (including parts) 38.3 3.9 30.0 0.4 46.8 2.6 25.3
37 Transportation equipment, n.e.c. S S S S S S 31.0
38 Precision instruments and apparatus 34.5 1.0 29.4 S S 14.2
39 Furniture, mattresses and mattress supports, lamps, lighting fittings, and... 48.6 0.7 S S 48.0 S
40 Miscellaneous manufactured products 47.4 1.1 46.1 0.3 49.0 0.9 13.9
41 Waste and scrap S S S S S S 31.3
43 Mixed freight 26.9 2.0 23.7 1.0 24.6 1.5 21.0
-- Commodity unknown 44.7 37.1 S S S

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.