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 15.0 18.0 5.7
01 Live animals and live fish
02 Cereal grains 37.3 0.3 40.2 1.9 36.6 1.2 34.8
03 Other agricultural products S S 46.3 S S 41.1
04 Animal feed and products of animal origin, n.e.c. 30.0 0.3 35.5 0.3 25.3 0.5 S
05 Meat, fish, seafood, and their preparations 33.5 1.5 26.8 0.4 31.6 1.1 27.3
06 Milled grain products and preparations, and bakery products S S S S S S S
07 Other prepared foodstuffs and fats and oils 17.2 0.7 29.8 0.6 29.7 0.9 S
08 Alcoholic beverages 38.7 1.4 49.8 0.8 S S 45.7
09 Tobacco products S S S S S S 31.6
10 Monumental or building stone S S S S S S S
11 Natural sands 38.4 S S S S S
12 Gravel and crushed stone 32.5 28.6 3.9 46.2 1.1 S
13 Nonmetallic minerals n.e.c. S S S S S S 29.2
14 Metallic ores and concentrates S S S S S S 31.6
15 Coal 17.4 0.2 15.3 3.6 18.4 4.6 14.3
17 Gasoline and aviation turbine fuel 19.5 0.3 16.9 1.0 32.3 0.6 S
18 Fuel oils 34.7 0.6 32.8 1.4 37.4 0.3 S
19 Coal and petroleum products, n.e.c. 29.0 0.3 38.6 0.6 40.0 1.2 S
20 Basic chemicals S S S S 45.0 0.4 S
21 Pharmaceutical products 19.5 0.9 S S S S 19.1
22 Fertilizers S S S S S S 36.4
23 Chemical products and preparations, n.e.c. S S 46.4 41.3 37.4
24 Plastics and rubber 45.1 1.1 38.0 0.2 S S 28.3
25 Logs and other wood in the rough S S 47.1 S S 38.8
26 Wood products 15.0 0.3 S S S S 22.7
27 Pulp, newsprint, paper, and paperboard S S S S S S S
28 Paper or paperboard articles 32.9 0.1 25.0 25.6 S
29 Printed products 9.6 0.2 29.0 42.5 13.1
30 Textiles, leather, and articles of textiles or leather 38.7 0.9 30.9 24.7 6.1
31 Nonmetallic mineral products 27.1 0.7 41.9 4.6 43.4 1.0 49.2
32 Base metal in primary or semi finished forms and in finished basic shapes 24.6 0.4 35.5 0.4 31.8 0.3 25.3
33 Articles of base metal 17.6 0.6 28.3 0.2 37.4 0.4 22.7
34 Machinery 23.2 1.8 28.8 0.1 34.8 0.3 29.1
35 Electronic and other electrical equipment and components and office equipment 20.3 2.6 37.1 0.1 40.8 0.3 13.6
36 Motorized and other vehicles (including parts) 25.6 0.7 28.5 31.1 0.2 29.2
37 Transportation equipment, n.e.c. S S S S S S 17.2
38 Precision instruments and apparatus 14.4 0.6 S S 40.0 0.1 14.6
39 Furniture, mattresses and mattress supports, lamps, lighting fittings, and... 26.5 0.4 38.8 0.1 31.5 32.6
40 Miscellaneous manufactured products 29.8 1.6 32.3 0.3 33.4 0.7 11.0
41 Waste and scrap S S S S S S 25.1
43 Mixed freight 20.8 2.0 36.6 1.1 21.4 0.5 19.1
-- Commodity unknown 37.3 49.6 0.1 S S 39.2

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.