Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997

Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997

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

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All Commodities

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 8.0 4.2 9.9 10.4 11.8 18.8 16.9 8.5 21.1 12.4 23.0 44.5
Single modes 8.4 4.6 10.2 12.0 13.2 20.9 17.1 9.6 22.3 14.5 25.7 31.3
Truck 10.1 5.0 12.3 12.4 17.8 22.7 9.0 9.7 16.0 14.2 30.6 39.2
Rail 15.3 11.8 18.7 19.4 16.4 29.7 19.9 12.2 27.7 13.8 16.0 14.8
Water 38.9 28.5 30.2 43.2 25.9 35.1 S 29.1 S 24.5 24.6 42.9
Air (including truck and air) 42.8 49.7 22.5 32.8 37.5 13.4 27.5 34.9 9.3 21.9 13.5 26.9
Pipeline S S S S S S S S S S S S
Multiple modes 19.7 13.2 42.1 37.8 26.1 63.0 32.3 20.3 28.4 8.2 10.8 13.5
Parcel, USPS or courier 17.9 16.7 39.9 25.3 19.9 61.8 15.4 21.5 37.6 8.2 10.9 13.8
Truck and rail 37.0 27.4 115.5 47.1 23.0 422.7 44.9 23.2 104.4 39.5 7.9 16.7
Other multiple modes 42.0 28.7 72.6 46.5 27.0 63.2 43.6 23.5 29.7 18.8 28.1 21.8
Other and unknown modes 33.6 10.0 39.1 41.2 21.5 78.3 S 21.3 S 39.4 S S

SCTG 01-05, Agriculture products and fish

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 17.3 30.1 21.2 22.6 34.2 29.8 22.9 29.9 34.2 34.6 S S
Single modes 17.3 30.3 21.4 22.6 34.2 30.0 22.9 29.1 35.9 33.4 S S
Truck 17.3 30.8 22.1 22.6 34.2 30.3 22.9 31.9 42.1 33.4 S S
Rail S S S S 45.2 31.9
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S 31.6
Parcel, USPS or courier
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S S S S S S S S S 31.6 S S

SCTG 06-09, Grains, alcohol, and tobacco products

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 8.7 14.9 27.9 21.7 38.0 115.6 47.0 34.1 439.9 34.9 47.6 48.8
Single modes 8.6 17.4 33.7 21.7 38.5 117.6 47.0 38.9 509.8 35.2 16.7 36.3
Truck 8.6 17.4 33.7 21.7 38.5 117.6 47.0 38.9 509.8 35.2 16.7 36.3
Rail
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S 39.1 S S 36.8 S S 43.4 S S 16.7 S
Parcel, USPS or courier S 40.4 S S 42.9 S S 44.3 S S 16.7 S
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S S S S S S S S S 31.6 48.7 3.5

SCTG 10-14, Stones, non-metallic minerals, and metallic ores

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes S 27.7 S 21.1 35.3 139.3 27.2 24.9 232.0 29.8 S S
Single modes S 27.7 S 21.2 35.3 139.2 27.3 24.9 231.7 29.9 S S
Truck S 27.8 S 24.3 35.9 80.3 40.6 23.1 132.6 30.2 S S
Rail 31.6 44.0 278.4 40.7 44.7 S 46.2 43.8 S 39.3 29.2 11.8
Water S S S S S S 31.6
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S 31.6
Parcel, USPS or courier S S S S S S 31.6
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S

SCTG 15-19, Coal and petroleum products

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 9.9 11.9 18.4 14.4 12.1 19.8 20.0 9.6 24.3 S 26.5 S
Single modes 11.6 13.0 20.1 16.6 13.9 21.6 20.5 10.9 25.8 S 24.4 S
Truck 31.6 25.8 55.4 25.5 35.5 36.4 26.2 32.4 61.7 S 18.6 S
Rail 19.4 15.3 29.0 19.4 16.7 28.1 20.6 13.0 29.0 6.1 7.9 11.6
Water 40.6 23.4 27.8 47.4 26.2 34.4 S 30.3 S 22.3 28.5 27.7
Air (including truck and air)
Pipeline S S S S S S
Multiple modes 36.7 28.8 74.8 38.6 27.0 65.3 33.7 23.5 31.6 15.8 36.8 35.2
Parcel, USPS or courier S S S S S S S S S 31.6 S S
Truck and rail S S S S S S 27.9
Other multiple modes 43.1 28.9 72.3 46.7 27.0 63.2 44.2 23.5 29.6 18.8 28.3 21.2
Other and unknown modes 49.0 23.3 84.5 41.3 22.6 80.4 S 23.5 S S S S

SCTG 20-24, Pharmaceutical and chemical products

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 33.6 15.3 39.9 S 23.1 S 40.9 24.8 36.3 32.1 35.3 86.8
Single modes 33.1 15.6 39.8 S 23.6 S 42.4 26.8 41.2 30.0 27.6 66.5
Truck 37.6 16.8 48.4 44.1 24.2 49.0 14.6 25.4 18.1 26.3 29.2 68.1
Rail 18.8 19.3 14.1 16.9 27.1 19.7 15.8 30.2 17.2 15.0 13.2 17.2
Water S S S S S S S S S 31.6 29.8 8.4
Air (including truck and air) S 47.6 S 41.8 45.2 191.3 42.1 S S 21.2 22.8 25.7
Pipeline S S S S S S S S S S S S
Multiple modes S 33.5 S S 33.5 S S 34.9 S 16.2 S S
Parcel, USPS or courier 39.9 28.0 144.2 33.5 21.7 111.5 42.4 23.4 209.4 16.2 42.4 146.4
Truck and rail S 37.5 S S 33.9 S S 35.0 S 32.7 21.2 20.6
Other multiple modes
Other and unknown modes S 34.2 S S 45.1 S S S S S S S

SCTG 25-30, Logs, wood products, and textile and leather

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 15.6 24.3 46.0 31.7 27.3 49.5 22.4 18.9 54.1 24.4 21.0 16.2
Single modes 16.3 25.1 47.2 31.9 28.1 51.8 22.0 21.7 64.3 34.5 23.2 16.9
Truck 17.2 25.1 46.1 33.3 28.1 51.1 24.1 21.7 61.7 35.0 23.3 16.4
Rail 37.3 S S 27.9 S S 31.2 S S 23.0 27.9 12.5
Water
Air (including truck and air) S S S S S S S S S 27.0 31.0 95.4
Pipeline S S S S S S
Multiple modes 22.7 20.1 46.2 38.0 39.6 34.5 S 40.7 S 43.7 S S
Parcel, USPS or courier 28.0 29.6 81.3 33.9 25.6 118.2 26.4 31.3 81.5 44.3 18.8 38.1
Truck and rail 48.4 38.8 37.2 42.6 40.8 33.0 S 40.9 S 24.6 23.6 28.7
Other multiple modes S S S S S S 31.6
Other and unknown modes 29.8 27.5 153.1 S 40.9 S S 39.7 S S S S

SCTG 31-34, Base metal and machinery

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 13.3 14.5 20.6 18.0 22.9 24.3 34.0 19.8 55.5 14.6 16.1 35.2
Single modes 13.6 15.6 20.3 18.1 23.0 24.2 34.2 20.1 53.9 17.4 22.0 57.2
Truck 11.8 15.3 18.3 14.5 23.2 20.3 16.8 18.9 24.6 17.9 24.0 64.9
Rail S S S S 39.9 S S 38.0 S 27.5 27.8 15.3
Water S S S S S S S S S 27.9 30.8 36.0
Air (including truck and air) 44.4 45.2 17.2 S 38.8 S 46.8 48.6 37.2 27.8 19.8 35.5
Pipeline S S S S S S
Multiple modes 30.4 22.0 86.0 37.4 24.4 198.6 43.1 24.2 395.5 18.2 22.4 25.0
Parcel, USPS or courier 26.5 22.5 34.4 33.8 32.8 34.9 33.3 21.6 29.6 18.8 22.5 25.0
Truck and rail S S S S 48.0 S S 36.2 S 27.7 25.1 30.5
Other multiple modes S S S S S S S S S 31.6 31.6 62.5
Other and unknown modes 24.7 20.8 73.7 S 21.3 S S 44.6 S 35.2 S S

SCTG 35-38, Electronic, motorized vehicles, and precision instruments

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 21.0 26.9 20.7 18.5 36.4 15.4 32.8 36.8 17.6 15.8 20.1 38.1
Single modes 19.2 28.8 18.4 18.9 37.4 16.0 34.7 37.1 17.9 S 46.5 S
Truck 19.6 30.3 20.7 16.6 36.0 18.6 32.3 35.9 21.3 37.0 28.7 35.8
Rail 44.3 43.5 12.2 S 46.1 S S 40.2 S 27.0 25.2 35.6
Water
Air (including truck and air) S S S S S S S 49.1 S 24.9 21.0 37.1
Pipeline S S S S S S S S S S
Multiple modes 48.9 22.9 83.2 21.8 45.7 37.3 27.8 42.0 32.2 11.6 14.8 14.4
Parcel, USPS or courier 48.9 22.2 86.1 21.8 36.9 50.0 27.8 44.2 48.7 11.6 14.8 14.4
Truck and rail S S S S S S 34.3
Other multiple modes
Other and unknown modes 43.9 42.9 10.1 S S S S 45.0 S S S S

SCTG 39-43, Furniture, mixed freight and misc manufactured products

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 13.2 22.9 42.6 S 22.0 S 26.6 17.6 92.7 17.3 34.5 145.9
Single modes 13.5 25.5 43.5 S 22.1 S 29.1 18.9 100.3 41.3 S S
Truck 13.5 21.6 45.6 S 22.5 S 29.1 18.6 112.7 41.9 S S
Rail S S S S S S 31.6
Water
Air (including truck and air) S 48.4 S S S S S S S 40.6 25.1 58.5
Pipeline S S S S S S
Multiple modes 24.4 43.0 147.8 S 42.7 S 30.6 S S 16.2 16.3 32.4
Parcel, USPS or courier 24.4 46.9 171.9 S 45.6 S 30.6 S S 16.2 16.3 32.5
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S 32.6 S S 32.9 S S 39.9 S S S S

Commodity Unknown

Mode of transportation Value Tons Ton-miles Average miles per shipment
CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002 CV
2002
CV
1997
Std. error of percent change 1997-2002
All modes 48.7 37.6 69.9 S S S S S S S 49.4 S
Single modes 49.2 38.7 79.7 S S S S S S S S S
Truck S 39.7 S S S S S S S S S S
Rail S S S S S S 29.8
Water
Air (including truck and air) S S S S S S 30.9
Pipeline S S S S S S
Multiple modes S S S 48.3 S S S 48.8 S S 33.3 S
Parcel, USPS or courier S S S 48.3 S S S 48.8 S S 33.3 S
Truck and rail
Other multiple modes
Other and unknown modes

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

NOTE: The Introduction and appendixes give information onf confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs.

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