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 7.3 6.7 10.5 9.6 8.1 10.6 19.6 14.8 17.2 8.2 14.7 9.7
Single modes 8.1 7.5 11.6 9.3 8.2 10.6 19.8 15.8 18.0 19.9 9.0 28.7
Truck 8.2 7.7 12.1 9.7 9.6 11.6 9.5 26.1 22.4 15.9 12.5 26.4
Rail 25.6 15.4 25.6 28.4 23.0 33.4 30.4 25.6 26.5 8.0 10.7 12.7
Water S S S S S S 27.9
Air (including truck and air) 26.7 26.7 20.4 27.4 S S 29.3 S S 6.4 4.8 7.3
Pipeline S S S S S S S S S S
Multiple modes 24.6 15.6 34.7 24.6 S S 23.3 S S 5.8 7.4 6.9
Parcel, USPS or courier 24.6 16.8 36.5 27.2 14.6 26.0 27.4 19.7 24.7 5.8 7.4 6.9
Truck and rail S S S S S S S S S 25.5 17.5 41.6
Other multiple modes S S S S S S S S S 29.8 S S
Other and unknown modes 21.4 17.8 29.9 S 37.2 S 24.2 27.9 18.8 34.6 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 15.0 10.4 18.5 20.9 12.4 21.3 24.9 20.7 19.3 28.7 23.3 39.7
Single modes 15.0 10.6 18.8 21.0 12.5 21.6 24.9 21.2 19.7 28.6 27.7 47.7
Truck 15.0 12.0 20.7 25.4 14.8 27.8 16.7 15.9 23.1 29.6 28.4 49.9
Rail 36.9 21.0 28.2 37.9 27.5 36.3 32.9 28.1 21.7 11.0 11.6 13.9
Water S S S S S S 27.9
Air (including truck and air) S S S S S S S S S 31.6 29.9 43.6
Pipeline S S S S S S
Multiple modes S S S S S S S S S 27.9 18.6 4.8
Parcel, USPS or courier S S S S S S S S S 27.9 27.6 5.7
Truck and rail S S S S S S 20.2
Other multiple modes S S S S S S 31.6
Other and unknown modes 48.2 S S 43.9 S S 49.3 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 17.6 7.1 12.5 37.1 14.3 42.2 S 18.0 S 30.8 18.4 70.3
Single modes 17.6 7.5 13.0 37.1 15.3 46.2 S 18.5 S 30.8 19.0 73.4
Truck 17.0 9.2 10.3 12.2 14.7 11.1 28.7 14.0 27.2 32.5 18.4 68.7
Rail S 21.6 S S 25.0 S S 29.0 S 15.7 6.7 16.3
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S 32.4 26.6 27.4
Parcel, USPS or courier S S S S S S S S S 31.6 29.8 26.7
Truck and rail S S S S S S S S S 31.6 30.0 59.0
Other multiple modes
Other and unknown modes S 46.1 S S 49.2 S S S S 30.2 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 16.2 26.0 20.7 23.8 22.4 31.1 29.3 31.5 34.4 S 30.9 S
Single modes 16.3 26.1 21.1 24.6 19.9 30.6 30.4 32.4 35.3 41.6 S S
Truck 16.3 26.9 22.3 24.6 20.9 32.5 30.4 32.4 37.8 41.6 S S
Rail S S S S S S S S
Water
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S S S S S S S S S 29.9 30.2 47.6
Parcel, USPS or courier S S S S S S S S S 29.9 30.2 47.6
Truck and rail
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 38.1 21.2 39.0 48.6 22.2 42.0 49.6 49.8 39.7 39.5 33.1 85.3
Single modes 38.2 22.4 40.4 48.7 23.2 43.3 49.7 S S 40.3 29.3 68.2
Truck 38.2 22.4 40.4 48.7 23.2 43.3 S S S 40.6 29.3 68.4
Rail
Water
Air (including truck and air) S S S S S S S S S 31.6 31.6 109.7
Pipeline S S S S S S
Multiple modes S S S S S S S S S 39.5 31.6 28.0
Parcel, USPS or courier S S S S S S S S S 39.5 30.6 22.7
Truck and rail
Other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S S S S 34.8 38.8 20.9

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 18.8 17.2 47.0 28.1 42.5 73.9 36.0 19.5 62.9 13.6 19.7 11.3
Single modes 24.7 21.5 43.5 28.3 44.5 78.5 36.3 21.6 70.5 28.4 21.8 58.0
Truck 24.9 21.8 44.6 28.0 46.9 84.8 38.0 15.4 101.8 27.8 21.9 58.2
Rail S 36.5 S S 36.5 S S 43.8 S 48.5 18.7 38.4
Water
Air (including truck and air) S S S S S S S S S 28.0 22.6 40.5
Pipeline S S S S S S S S S S
Multiple modes 39.9 24.7 220.9 20.1 S S 20.4 S S 14.4 15.2 12.4
Parcel, USPS or courier 39.9 19.4 230.7 20.1 14.8 33.4 20.4 10.8 32.6 14.4 15.2 12.4
Truck and rail S S S S S S 29.9
Other multiple modes
Other and unknown modes 34.2 S S S S S S S S 29.5 26.6 37.1

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 26.6 35.9 26.9 22.9 31.2 33.7 44.7 31.4 114.5 18.3 13.6 16.9
Single modes 32.2 50.0 41.5 24.7 26.5 34.6 47.9 32.4 135.3 22.0 19.5 89.6
Truck 32.5 S S 24.7 26.5 34.6 47.9 32.4 135.8 21.1 20.8 128.0
Rail S S S S S S 31.6
Water
Air (including truck and air) S 29.0 S S 33.8 S S 33.5 S 21.7 11.9 29.9
Pipeline S S S S S S
Multiple modes 28.8 39.2 13.9 25.6 24.6 10.3 22.6 25.8 8.9 12.0 8.6 14.0
Parcel, USPS or courier 28.8 39.2 13.9 25.7 24.6 10.3 22.8 25.8 8.9 12.0 8.6 14.0
Truck and rail
Other multiple modes S S S S S S 31.6
Other and unknown modes 34.6 S S 38.6 S S S S 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 12.1 15.6 23.7 24.5 48.1 20.4 24.4 S S 23.3 17.0 11.5
Single modes 13.0 13.7 23.7 25.4 48.6 20.4 24.4 S S 35.7 15.6 23.6
Truck 13.0 13.4 23.8 23.9 48.8 18.8 23.2 S S 33.8 16.0 22.6
Rail 38.8 32.9 41.1 S 48.8 S S S S 32.2 26.6 27.2
Water
Air (including truck and air) S 43.9 S S S S 37.0 S S 16.5 11.8 23.6
Pipeline S S S S S S
Multiple modes 21.2 37.5 17.8 20.5 24.4 18.0 27.9 26.0 18.9 20.4 12.4 14.5
Parcel, USPS or courier 21.3 37.8 17.5 20.5 25.1 16.5 28.8 28.2 19.6 20.4 12.4 14.5
Truck and rail S S S S S S S S S 28.8 31.6 10.1
Other multiple modes S S S S S S 31.6
Other and unknown modes 27.5 23.5 105.6 S 38.0 S S S S 26.9 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 11.2 11.1 21.0 13.2 8.5 21.7 21.6 6.8 28.4 13.3 13.1 14.1
Single modes 15.4 10.1 31.8 14.4 10.2 26.6 20.1 6.1 27.5 24.9 29.0 65.2
Truck 15.7 9.3 33.6 14.4 10.2 26.7 20.3 5.9 28.0 S 34.7 S
Rail S S S S S S S S S 27.9 31.6 56.9
Water
Air (including truck and air) 33.9 35.0 30.0 27.9 34.1 17.1 25.4 33.7 13.9 8.6 5.9 9.5
Pipeline S S S S S S
Multiple modes 16.3 24.5 21.2 28.9 15.8 35.3 49.4 22.2 83.6 11.1 6.9 8.8
Parcel, USPS or courier 19.4 25.0 21.0 28.2 16.0 23.7 35.3 17.7 26.6 11.0 6.9 8.7
Truck and rail S S S S S S S S S 29.8 31.6 41.2
Other multiple modes S S S S S S 31.6
Other and unknown modes 33.4 31.9 36.0 34.9 S S S S S 47.5 33.6 20.4

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 14.2 13.5 16.1 S 17.9 S S 19.7 S 12.4 15.0 14.7
Single modes 19.2 18.0 21.7 S 18.2 S S 20.5 S 14.7 20.8 22.8
Truck 19.2 18.4 22.1 43.3 19.1 38.6 S 19.9 S 15.3 24.2 35.1
Rail S 36.1 S S 35.5 S S 36.3 S 28.9 25.4 75.4
Water
Air (including truck and air) S S S S 46.2 S S 47.8 S 28.0 17.8 20.7
Pipeline S S S S S S
Multiple modes 29.3 43.5 35.3 S 34.2 S S 35.5 S 9.1 7.9 10.6
Parcel, USPS or courier 29.3 43.5 35.3 S 34.2 S S 35.5 S 9.1 7.9 10.6
Truck and rail
Other multiple modes
Other and unknown modes 48.6 32.8 141.9 34.2 36.4 75.1 S S S 42.6 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 S 33.1 S S S S S 46.8 S S 28.3 S
Single modes S 33.7 S S S S S 46.9 S S 26.6 S
Truck S 34.7 S S S S S 48.3 S S 28.2 S
Rail
Water
Air (including truck and air) S S S S S S 29.9
Pipeline S S S S S S
Multiple modes S 49.4 S S 31.1 S S 33.4 S S 28.3 S
Parcel, USPS or courier S 49.4 S S 31.1 S S 33.4 S 28.6 28.3 15.0
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S S S S S S 49.4 S S 26.5 31.6 14.7

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.