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 5.9 4.3 7.7 13.6 3.9 15.0 39.2 8.9 76.1 15.7 16.5 28.1
Single modes 6.7 5.3 9.0 13.9 4.0 14.8 40.4 8.7 80.6 25.2 11.9 38.3
Truck 7.1 5.9 9.4 11.7 5.3 11.8 12.5 5.8 17.4 24.2 10.6 35.5
Rail 23.5 9.7 30.0 49.2 15.1 76.9 S 19.7 S 4.1 4.2 6.1
Water 16.8 27.6 36.4 18.7 31.9 52.7 19.1 32.6 52.6 11.1 10.9 16.7
Air (including truck and air) S 26.8 S S 39.6 S S 47.7 S 8.4 8.7 15.6
Pipeline S S S S S S S S S S S S
Multiple modes 18.3 13.7 22.9 35.7 43.8 41.0 40.0 S S 6.9 8.1 12.7
Parcel, USPS or courier 15.5 14.1 19.5 16.6 16.9 23.6 21.2 20.1 38.2 6.9 8.2 12.7
Truck and rail S 28.0 S 41.0 26.6 16.8 41.5 30.2 18.6 14.3 13.2 18.7
Other multiple modes 48.4 S S S S S S S S 32.4 S S
Other and unknown modes 33.4 17.9 40.5 S 17.5 S S 33.6 S S 40.8 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 25.6 11.2 21.3 29.8 9.5 34.8 S 17.0 S 22.8 24.4 85.5
Single modes 24.4 11.5 19.6 29.7 9.5 31.9 S 18.2 S 29.1 18.0 52.6
Truck 28.5 13.4 20.6 29.9 12.6 22.8 33.6 5.3 32.2 28.8 18.4 52.2
Rail S 26.3 S S 32.6 S S 42.1 S 3.3 12.5 14.6
Water 16.7 27.7 38.8 18.2 31.7 57.4 18.7 32.2 56.7 11.1 10.7 15.3
Air (including truck and air) S S S S S S S S S 36.1 31.6 12.8
Pipeline S S S S S S
Multiple modes S 48.5 S S S S S S S 19.7 15.7 35.8
Parcel, USPS or courier S 48.9 S S 26.0 S S 35.2 S 19.3 19.1 39.6
Truck and rail S 37.0 S S 47.3 S S S S 27.3 20.1 21.5
Other multiple modes S S S S S S S S S 26.2 27.9 40.1
Other and unknown modes S 30.5 S S 30.6 S S S S S 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 25.6 15.5 29.5 29.9 6.7 37.1 25.6 11.6 29.2 21.4 7.9 92.7
Single modes 26.0 14.9 29.0 27.9 6.5 31.9 25.6 11.0 29.5 20.5 7.7 36.4
Truck 29.1 18.6 34.0 36.3 7.7 42.7 42.8 10.6 58.3 24.9 9.9 42.6
Rail 20.0 13.3 22.5 19.1 10.3 24.6 19.3 14.5 24.5 4.4 7.1 7.5
Water S S S S S S 31.6
Air (including truck and air) S S S S S S S S S 31.6 24.9 36.4
Pipeline S S S S S S S S S S
Multiple modes S S S S 49.4 S S S S 27.4 S S
Parcel, USPS or courier S S S S S S S S S 26.7 35.3 135.6
Truck and rail S S S S S S S S S 31.6 26.1 38.8
Other multiple modes S S S S S S S S S 31.6 31.6 80.9
Other and unknown modes S 45.4 S S 45.5 S S 49.2 S S S S

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 27.6 S S 26.2 20.9 34.5 S 40.2 S 20.5 38.6 47.7
Single modes 27.8 S S 26.5 21.0 34.7 S 42.0 S 19.0 38.8 45.6
Truck 28.4 S S 26.7 21.0 35.2 S 45.6 S 19.0 39.6 46.6
Rail S 39.1 S S 40.5 S S 41.5 S 23.9 28.7 56.6
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S 31.6 29.7 65.1
Parcel, USPS or courier S S S S S S S S S 31.6 34.9 313.6
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 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 28.7 19.2 33.3 26.6 22.7 27.6 44.2 21.5 93.9 S 25.9 S
Single modes 28.8 19.3 33.3 26.6 22.8 27.7 44.3 21.9 95.6 S 22.7 S
Truck 27.7 20.3 30.8 26.8 23.8 27.6 45.3 25.8 115.6 S 23.3 S
Rail S S S S S S 30.9
Water
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S S S S S S S
Multiple modes S S S S S S S S S 35.6 S S
Parcel, USPS or courier S S S S S S S S S 37.8 S S
Truck and rail
Other multiple modes S S S S S S S S S 31.6 31.6 S
Other and unknown modes S 34.5 S S S S S S S 32.7 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 15.2 14.6 29.0 25.7 12.7 74.7 26.7 16.9 69.4 21.3 15.3 41.7
Single modes 15.4 15.6 29.6 25.9 13.0 76.4 26.4 17.1 68.2 26.8 26.9 83.8
Truck 17.0 14.7 28.8 27.1 15.1 83.9 22.1 17.5 58.4 19.4 28.1 76.1
Rail 38.7 35.0 125.7 S 19.1 S 44.3 21.4 116.2 19.3 7.3 22.1
Water
Air (including truck and air) S 38.3 S S 44.0 S S 38.3 S 16.4 18.1 25.9
Pipeline S S S S S S
Multiple modes 41.1 18.5 90.5 49.7 30.7 131.3 S 30.2 S 9.3 13.5 24.0
Parcel, USPS or courier 21.1 18.1 25.7 25.0 25.2 39.2 28.2 18.7 53.5 9.2 13.9 24.5
Truck and rail S 38.4 S S 41.3 S S 40.6 S 15.2 17.8 20.6
Other multiple modes S S S S S S S S S 29.8 31.6 85.6
Other and unknown modes 25.8 42.0 28.6 35.4 34.5 27.4 45.6 28.7 149.8 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 27.3 4.8 34.2 36.4 13.1 55.7 41.2 15.5 78.6 12.5 15.1 21.3
Single modes 30.5 7.6 41.1 36.7 13.5 57.9 42.2 16.1 82.4 32.8 21.6 47.8
Truck 30.2 7.7 39.0 35.9 13.0 54.0 41.5 15.2 73.0 39.1 22.6 51.2
Rail S S S S S S S S S 24.5 30.0 50.1
Water
Air (including truck and air) 38.2 24.9 76.0 37.9 23.7 41.3 39.8 26.3 47.2 15.0 10.3 31.0
Pipeline S S S S S S
Multiple modes 37.1 20.2 37.6 S 10.1 S S 13.6 S 6.6 8.9 10.6
Parcel, USPS or courier 37.1 20.5 38.0 S 11.0 S S 14.2 S 6.6 8.9 10.6
Truck and rail S S S S S S 26.4
Other multiple modes S S S S S S S S S 31.6 31.6 0.4
Other and unknown modes S 27.7 S S S S S 32.6 S 34.4 48.2 33.9

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 8.7 10.8 15.5 15.4 10.4 11.9 13.5 7.4 16.7 21.1 18.2 34.8
Single modes 8.6 11.5 17.4 16.0 10.7 11.8 13.4 7.2 17.9 24.2 37.6 96.5
Truck 8.8 11.5 17.4 17.2 11.8 11.9 13.2 6.0 15.9 24.5 33.7 87.9
Rail 23.6 33.4 57.3 20.2 23.3 40.9 24.9 22.4 52.6 20.0 18.1 23.1
Water S S S S S S 31.6
Air (including truck and air) S 42.9 S S 37.9 S S 39.0 S 7.3 8.1 11.0
Pipeline S S S S S S
Multiple modes 14.0 21.6 6.9 21.8 39.8 5.3 32.5 S S 15.0 14.1 24.6
Parcel, USPS or courier 13.4 19.0 6.4 15.9 26.0 7.9 20.9 38.0 12.1 15.2 14.1 24.7
Truck and rail 42.7 43.9 8.5 45.0 S S 46.2 S S 24.0 20.8 53.0
Other multiple modes S S S S S S S S S 28.9 30.7 46.1
Other and unknown modes 42.6 23.7 75.4 S 29.2 S S 26.7 S 49.8 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 14.2 14.4 20.5 23.5 11.7 26.0 25.6 14.8 33.7 9.1 22.0 37.7
Single modes 13.1 13.6 21.2 25.1 11.1 29.1 27.5 12.8 36.9 29.3 43.9 235.4
Truck 14.1 14.0 19.6 26.2 12.2 31.0 29.2 14.4 40.4 31.5 47.5 205.6
Rail 44.8 44.8 14.0 44.2 29.8 47.9 45.5 27.3 52.6 26.5 22.5 25.9
Water
Air (including truck and air) S 46.5 S S S S S S S 10.3 23.1 41.6
Pipeline S S S S S S
Multiple modes 20.6 25.1 24.5 22.9 29.2 27.9 27.6 30.9 47.6 12.1 10.6 15.5
Parcel, USPS or courier 21.9 25.4 23.9 28.9 30.6 16.0 31.0 34.3 26.5 12.1 10.6 15.5
Truck and rail S S S 44.5 S S 47.5 S S 26.3 29.8 24.4
Other multiple modes S S S S S S 30.4
Other and unknown modes S 34.9 S S 32.0 S 43.9 45.9 17.0 S 33.0 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 11.7 22.8 39.0 7.0 25.1 19.6 10.7 13.0 15.9 41.7 9.5 23.9
Single modes 10.2 24.8 38.1 7.2 24.4 18.9 10.9 12.8 15.5 S 13.0 S
Truck 10.1 25.5 39.8 7.1 29.6 27.8 10.7 15.4 21.8 S 12.7 S
Rail S 25.7 S S 27.2 S S 18.3 S 31.6 31.3 49.0
Water
Air (including truck and air) S 36.5 S S 29.7 S S 36.4 S 20.5 15.4 41.3
Pipeline S S S S S S
Multiple modes 47.0 17.3 126.1 39.9 S S 38.3 28.0 76.9 9.4 3.3 9.1
Parcel, USPS or courier 46.9 17.8 127.9 40.0 15.3 122.8 38.1 13.4 103.5 9.4 3.3 9.1
Truck and rail S S S S S S S S S 31.6 S S
Other multiple modes S S S S S S S S S 31.6 31.6 24.6
Other and unknown modes S 30.5 S S 45.7 S S 43.9 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 40.1 43.5 20.8 40.1 S S S S S 27.0 33.0 164.4
Single modes 41.1 48.2 24.4 41.8 S S S S S 35.9 S S
Truck 33.6 33.4 20.5 S S S S S S 36.2 S S
Rail S S S S S S S S S 32.8 30.4 38.2
Water S S S S S S 31.6
Air (including truck and air) S S S S S S 30.5
Pipeline S S S S S S
Multiple modes S S S S S S S S S 25.8 S S
Parcel, USPS or courier S S S S S S S S S 25.8 S S
Truck and rail
Other multiple modes
Other and unknown modes S S S S 44.5 S S S S 29.9 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

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.