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 15.1 8.5 17.3 16.3 5.8 19.3 15.9 4.2 20.7 12.0 9.1 28.9
Single modes 17.7 9.9 20.8 17.0 8.4 23.9 17.4 5.4 24.4 20.0 10.7 44.3
Truck 16.3 11.2 19.6 20.4 10.6 31.8 9.7 6.2 11.6 15.0 12.4 19.5
Rail 15.4 10.8 21.1 23.2 11.4 49.3 28.6 10.2 61.3 9.6 4.9 10.8
Water S 32.3 S 38.9 36.9 5.6 32.2 49.4 4.2 47.0 S S
Air (including truck and air) 46.5 19.3 126.5 S 22.7 S S 21.9 S 7.4 7.7 14.1
Pipeline 38.1 S S 44.0 S S S S S S S S
Multiple modes 9.3 11.7 13.5 21.0 42.1 30.6 25.0 15.8 47.3 8.4 8.3 22.2
Parcel, USPS or courier 9.2 7.8 13.1 20.2 18.4 24.8 32.0 11.8 58.3 8.4 8.4 22.4
Truck and rail 24.0 S S 18.6 36.8 43.0 23.6 21.9 47.6 15.4 11.1 26.6
Other multiple modes 35.7 S S 44.5 S S S 26.0 S 32.1 15.6 24.7
Other and unknown modes 29.2 12.7 25.4 41.7 41.3 14.9 25.3 31.2 7.1 S 34.1 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 15.1 15.3 15.1 17.2 25.8 10.1 25.8 23.4 18.7 22.2 25.8 97.1
Single modes 13.8 13.9 13.8 18.0 21.7 14.7 30.7 27.1 30.6 S S S
Truck 17.0 15.5 19.7 23.7 18.0 38.0 31.8 33.6 37.9 S S S
Rail S 36.8 S S 35.7 S S 26.2 S 24.8 6.6 22.7
Water 42.4 33.0 4.4 38.1 34.1 4.5 36.0 S S 21.3 30.5 4.7
Air (including truck and air) S S S S S S S S S 26.8 24.4 47.8
Pipeline S S S S S S
Multiple modes S 21.5 S 33.9 S S 45.5 45.0 131.0 15.6 11.8 28.4
Parcel, USPS or courier S 31.6 S S 49.8 S S 24.3 S 16.4 11.6 29.2
Truck and rail S 33.9 S S 35.9 S S 39.3 S 26.3 19.0 27.8
Other multiple modes 27.5 39.6 40.3 S S S 31.5 48.6 35.4 25.5 22.9 24.3
Other and unknown modes 46.7 46.4 9.7 S 48.1 S S 42.2 S S 22.1 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 9.6 16.9 16.9 15.7 16.9 23.9 17.4 18.8 27.2 S 25.6 S
Single modes 11.1 14.5 17.3 17.3 17.0 25.1 21.9 18.7 29.7 S 33.2 S
Truck 10.9 14.9 17.6 17.8 16.6 27.9 24.2 17.9 34.0 S 39.7 S
Rail 23.2 34.0 20.6 25.0 35.7 27.4 22.7 41.3 28.5 14.3 18.3 22.6
Water S S S S S S S S
Air (including truck and air) S S S S S S S S S 28.6 26.6 40.7
Pipeline S S S S S S
Multiple modes 45.1 S S S 41.0 S S 45.6 S 14.4 13.9 37.1
Parcel, USPS or courier S 42.5 S S 47.3 S S S S 22.1 18.0 53.3
Truck and rail S S S S 46.2 S S S S 27.9 23.6 37.3
Other multiple modes S 43.7 S S S S S S S 28.5 24.3 51.3
Other and unknown modes S 41.3 S S 42.0 S 49.4 S S S 34.2 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 35.9 38.8 32.9 40.0 27.5 106.6 46.6 S S S 41.3 S
Single modes 36.2 39.6 34.1 39.9 28.0 107.3 44.1 S S S 44.3 S
Truck 38.0 40.2 36.3 41.9 29.2 128.5 49.8 S S S 44.4 S
Rail 42.7 S S 41.1 S S 46.8 S S 28.1 29.8 5.3
Water 47.8 S S 44.4 S S 45.2 S S 25.9 30.3 6.7
Air (including truck and air) S S S S S S 29.4
Pipeline S S S S S S
Multiple modes S S S S S S S S S 30.0 S S
Parcel, USPS or courier S S S S 47.3 S S S S 30.7 S S
Truck and rail S S S S S S 29.9
Other multiple modes S S S S S S 38.1
Other and unknown modes S S S S S S S S S 29.6 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 21.5 19.1 41.8 22.6 22.4 61.9 15.8 41.6 68.5 S 35.5 S
Single modes 21.7 19.3 42.2 22.7 22.5 62.6 17.6 42.2 65.5 S 34.7 S
Truck 23.9 15.9 44.5 23.3 18.2 64.3 23.0 22.0 66.8 S 35.0 S
Rail S S 49.0 S S 26.8
Water S S S S S S 31.6
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 29.8 S S
Parcel, USPS or courier S S S S S S S S S 31.6 27.1 663.4
Truck and rail
Other multiple modes S S S S S S S S S 29.9 47.0 406.9
Other and unknown modes S 37.6 S S S S S S S 28.5 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 26.0 11.0 26.8 39.5 42.1 44.9 32.6 14.9 73.4 23.5 17.0 72.9
Single modes 27.6 14.1 35.3 40.0 43.5 46.5 33.3 15.1 80.6 28.3 S S
Truck 29.1 14.4 35.2 41.7 44.7 47.1 33.6 16.0 65.5 22.3 S S
Rail S 43.2 S S 36.9 S S S S 34.2 26.9 79.3
Water S S S S S S S S S 31.6 31.3 40.5
Air (including truck and air) S 41.8 S S S S S S S 22.7 16.0 41.7
Pipeline S S S S S S S S S S
Multiple modes 26.0 27.6 16.5 40.1 42.2 19.5 S 41.5 S 11.8 11.0 40.8
Parcel, USPS or courier 28.4 27.6 16.3 32.6 46.8 9.3 34.9 42.3 22.7 12.1 11.1 41.5
Truck and rail S 41.9 S S 41.7 S S 41.4 S 26.2 26.0 27.3
Other multiple modes 46.3 S S S S S S S S 21.1 27.2 35.7
Other and unknown modes S 20.8 S S 29.8 S S 37.0 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 22.7 14.7 26.3 14.2 15.2 18.1 23.6 8.3 39.4 16.3 7.1 23.0
Single modes 23.8 16.8 30.0 15.4 7.9 16.5 26.0 8.1 42.6 18.9 11.5 29.6
Truck 28.9 18.8 34.5 9.5 9.2 9.3 14.8 8.7 16.5 22.6 14.4 39.1
Rail 19.0 11.6 32.2 27.4 12.4 55.0 31.3 10.8 73.3 8.4 3.5 10.7
Water S 35.1 S S 44.7 S 46.2 S S 39.9 27.7 8.2
Air (including truck and air) S S S S 35.0 S S 47.7 S 15.2 9.6 26.5
Pipeline S S S S S S
Multiple modes 9.6 28.6 15.0 24.1 41.6 60.3 30.9 17.9 82.2 8.9 12.0 22.7
Parcel, USPS or courier 18.1 22.8 15.1 24.8 23.9 17.6 18.8 24.9 13.8 9.2 11.9 23.0
Truck and rail 24.8 19.1 28.8 28.1 49.0 49.0 32.5 24.5 57.1 17.0 17.6 25.4
Other multiple modes S S S S 33.4 S S 35.0 S S S S
Other and unknown modes 30.9 45.3 40.5 S S S S 29.6 S 47.1 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 12.3 7.1 10.1 33.0 20.5 48.6 16.6 13.3 17.6 18.5 12.7 28.2
Single modes 14.9 7.7 12.2 33.3 20.5 55.0 17.7 13.2 22.7 22.8 15.9 31.3
Truck 14.3 6.7 11.2 34.8 20.6 57.7 17.3 10.0 18.1 26.0 15.6 30.6
Rail 39.2 29.3 56.4 36.7 27.1 53.7 34.5 29.0 58.5 19.8 18.1 21.2
Water S S S S S S 30.8
Air (including truck and air) S S S S 31.4 S S 27.8 S 8.3 9.9 17.6
Pipeline S S S S S S S S S S
Multiple modes 28.3 30.0 32.6 31.1 S S 37.7 23.3 7.3 11.3 12.8 24.6
Parcel, USPS or courier 28.9 16.2 40.0 21.0 28.1 23.8 26.5 23.1 38.3 11.4 13.1 25.0
Truck and rail S 32.6 S S 31.8 S S 36.6 S 30.7 20.5 38.7
Other multiple modes S S S S S S S 39.2 S 26.0 27.4 44.4
Other and unknown modes 40.0 23.5 16.9 S 30.6 S S S S S 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 34.6 13.1 46.0 19.3 13.5 21.9 20.6 29.2 24.0 11.9 11.9 32.2
Single modes S 15.7 S 25.8 13.4 22.8 25.0 33.7 32.5 19.4 15.7 64.4
Truck 47.6 16.9 53.5 23.5 17.6 27.7 25.8 29.4 35.0 19.1 19.5 42.7
Rail S 27.5 S S 39.8 S S S S 30.8 21.8 12.4
Water S S S S S S 28.8
Air (including truck and air) S 20.1 S S 33.0 S S 37.0 S 12.4 7.7 23.0
Pipeline S S S S S S
Multiple modes 15.9 18.7 30.3 24.4 23.4 32.2 23.2 31.9 33.1 12.3 10.4 22.9
Parcel, USPS or courier 15.9 19.0 33.4 25.4 10.9 37.6 23.3 19.0 48.4 12.3 10.7 23.4
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S S S S 28.2 26.2 41.7
Other and unknown modes 46.6 22.5 64.1 33.3 26.9 69.0 S 32.7 S 48.0 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 8.7 S S 12.7 S S 13.3 39.3 46.0 7.7 12.7 16.4
Single modes 8.9 S S 13.2 S S 12.8 41.6 46.8 19.0 18.4 104.9
Truck 9.8 S S 9.7 S S 16.8 44.8 48.9 14.7 24.7 82.1
Rail S S S S S S S S S S S S
Water S S S S S S 31.6
Air (including truck and air) S S S S 48.9 S S 44.1 S 20.8 12.6 22.6
Pipeline S S S S S S
Multiple modes 24.5 22.1 46.1 26.3 25.9 52.5 25.9 27.8 57.4 6.8 10.5 11.7
Parcel, USPS or courier 24.7 22.9 47.3 25.3 16.3 43.7 27.1 25.4 65.9 6.9 10.6 11.7
Truck and rail 44.7 S S S S S S S S 27.6 28.1 81.7
Other multiple modes S 32.4 S S 29.6 S S 27.7 S 25.6 19.5 21.4
Other and unknown modes 49.2 S S 43.4 34.4 116.4 S 32.6 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 S 32.0 S 44.7 29.3 5.9 S 44.2 S S 27.8 S
Single modes S 36.9 S 40.5 29.5 3.7 S 43.7 S S 39.7 S
Truck S 38.1 S 24.3 35.6 3.2 S 47.0 S S 40.7 S
Rail S S S S S S 31.6
Water S S S S S S 29.9
Air (including truck and air) S S S S S S S S S 31.6 46.0 187.8
Pipeline S S S S S S
Multiple modes S 45.9 S S 42.5 S S S S 33.2 23.5 34.3
Parcel, USPS or courier S 47.1 S 49.2 34.2 7.8 S 42.6 S 34.4 23.6 35.2
Truck and rail S S S S S S S S S 31.6 31.6 24.2
Other multiple modes S S S S S S 31.6
Other and unknown modes S 46.9 S S S S S S S S 28.3 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.