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 11.9 7.3 17.5 34.5 14.3 73.6 23.4 40.0 51.9 22.9 14.2 23.3
Single modes 14.4 9.4 22.1 35.3 15.6 90.0 27.2 42.3 54.0 22.7 14.7 35.7
Truck 18.6 13.4 31.4 27.8 26.9 60.1 31.5 28.7 90.7 17.0 18.2 31.3
Rail 40.0 40.7 190.1 S 41.0 S 36.6 41.2 234.2 22.8 25.8 32.5
Water 22.8 35.8 18.8 48.7 48.8 31.7 S S S 35.1 21.0 18.9
Air (including truck and air) 25.6 37.1 30.2 19.5 S S 21.0 43.0 73.6 13.4 10.3 20.3
Pipeline 44.4 32.5 167.6 43.0 33.6 142.7 S S S S S S
Multiple modes 26.0 19.2 44.1 S 39.6 S S 21.5 S 12.9 12.9 17.6
Parcel, USPS or courier 17.4 25.1 23.3 19.4 33.8 36.1 38.4 42.1 50.8 15.3 13.2 17.7
Truck and rail S S S S S S S S S 31.6 30.3 217.8
Other multiple modes 32.2 39.6 111.9 S 43.4 S S 27.6 S 10.2 32.8 79.9
Other and unknown modes 21.6 28.0 25.8 S 40.6 S 28.2 S S S 24.7 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 20.6 25.2 27.3 31.8 32.4 53.0 39.0 37.2 74.9 31.4 32.4 87.9
Single modes 29.2 31.3 29.4 41.7 36.4 56.6 49.4 46.2 90.9 S 37.0 S
Truck 42.2 S S S S S S 46.3 S 36.2 17.0 13.0
Rail
Water 28.7 49.1 30.0 S 46.9 S S S S 17.5 12.1 18.0
Air (including truck and air) 33.0 27.3 127.6 30.1 26.5 121.4 30.2 36.3 123.0 16.4 16.9 44.9
Pipeline S S S S S S
Multiple modes 35.6 41.6 99.4 43.6 S S 40.0 32.7 90.3 18.0 24.7 65.8
Parcel, USPS or courier S S S S S S S S S 25.3 22.9 61.0
Truck and rail
Other multiple modes 36.6 41.7 99.5 43.9 S S 41.3 32.8 90.3 24.8 39.9 69.2
Other and unknown modes S 41.5 S S 41.7 S S 46.4 S 28.1 36.6 10.3

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 20.4 13.4 32.7 28.7 19.9 62.1 19.7 23.8 135.1 26.6 16.4 53.2
Single modes 22.5 13.4 31.6 31.5 21.0 61.5 41.1 22.2 113.6 42.9 12.8 75.4
Truck 22.9 13.6 30.5 32.6 21.0 61.1 S 23.1 S 23.2 12.2 23.2
Rail S S S S S S 31.6
Water S S S S S S 26.7
Air (including truck and air) S S S S S S S S S 23.6 30.2 45.1
Pipeline S S S S S S
Multiple modes 38.4 S S 38.4 S S 34.1 S S 23.8 20.7 45.9
Parcel, USPS or courier S S S S S S S S S 25.4 36.6 95.0
Truck and rail S S S S S S 31.6
Other multiple modes 46.6 S S 42.5 S S 38.1 S S 22.2 28.7 60.7
Other and unknown modes 49.6 47.0 88.2 S 47.1 S S 46.6 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 S S S S S S S S S S S S
Single modes S S S S S S S S S S 49.8 S
Truck S S S 48.9 S S S S S 37.4 46.7 9.5
Rail S S S S S S 31.6
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
Multiple modes
Parcel, USPS or courier
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 20.6 12.7 31.5 20.5 12.6 35.3 22.9 S S S 18.1 S
Single modes 21.7 13.1 32.4 21.6 13.0 36.3 27.7 S S 33.7 18.1 51.3
Truck 29.4 20.3 35.8 29.2 20.9 42.6 43.3 26.9 104.8 28.0 19.1 38.4
Rail 42.1 41.2 191.2 40.1 41.1 179.0 41.1 41.2 166.1 24.6 25.8 34.1
Water S S S S S S S S S S 30.3 S
Air (including truck and air) S S S S S S S S S 31.6 30.1 46.3
Pipeline 44.4 32.5 167.5 43.0 33.6 142.7 S S S S S S
Multiple modes S S S S S S S S S 25.9 30.3 743.5
Parcel, USPS or courier S S S S S S 31.6
Truck and rail S S S S S S 30.3
Other multiple modes S S S S S S 26.0
Other and unknown modes S 34.1 S S 35.7 S S 39.4 S 29.9 23.1 3.3

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 47.0 31.3 56.5 S S S S S S 34.8 35.0 43.0
Single modes S 31.2 S S S S S S S 39.7 17.8 70.7
Truck S 37.1 S S S S S S S S 18.0 S
Rail S S S S S S 31.6
Water S S S S S S S S S 29.8 S S
Air (including truck and air) S 39.1 S S 48.4 S S 46.7 S 46.1 12.8 52.3
Pipeline S S S S S S S S S S
Multiple modes 36.8 47.5 82.9 S 35.2 S S S S 28.8 22.5 27.1
Parcel, USPS or courier 34.7 S S S S S S S S 28.8 24.4 23.0
Truck and rail
Other multiple modes S S S S S S S S S 25.9 27.7 244.0
Other and unknown modes S S S S S S S S S S 48.3 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 14.4 20.1 16.0 S 45.2 S S 44.2 S 44.2 20.6 21.7
Single modes 15.8 20.0 17.4 S 37.4 S S 47.8 S 23.5 48.6 59.7
Truck 18.0 17.2 17.9 23.7 17.7 32.7 S 29.2 S 31.8 20.7 58.6
Rail
Water S S S S S S S S S 31.6 25.9 42.5
Air (including truck and air) 47.1 41.1 20.7 49.7 S S S S S 16.9 19.9 19.1
Pipeline S S S S S S
Multiple modes 31.8 38.9 16.7 S S S S S S 30.2 9.1 18.9
Parcel, USPS or courier 31.8 39.6 17.0 S S S S S S 30.5 9.1 19.0
Truck and rail
Other multiple modes S S S S S S S S S 31.8 30.5 79.8
Other and unknown modes 40.3 S S S 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 19.7 17.3 32.6 38.8 S S 27.4 16.6 53.8 26.0 16.8 26.5
Single modes 22.7 18.1 39.9 39.1 S S 28.6 16.5 56.3 24.7 28.3 43.6
Truck 23.4 18.6 46.2 41.3 S S 25.8 17.4 53.4 24.8 24.7 57.5
Rail
Water S S S S S S S S S S 30.3 S
Air (including truck and air) 48.6 41.2 39.5 S 43.3 S S 39.5 S 11.8 7.9 15.4
Pipeline S S S S S S
Multiple modes 21.3 S S 37.2 S S S 43.8 S 19.6 10.4 16.8
Parcel, USPS or courier 28.4 S S 45.5 S S 35.4 S S 18.0 9.8 14.2
Truck and rail
Other multiple modes 43.2 S S S S S S S S 17.5 S S
Other and unknown modes 31.1 28.4 52.5 29.2 40.6 34.8 S S S S 24.1 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 9.6 14.2 27.6 19.5 16.4 53.6 22.6 20.9 75.8 27.6 14.3 25.8
Single modes 10.4 11.9 25.1 21.6 17.7 56.3 26.0 22.3 96.7 32.1 20.2 33.8
Truck 12.8 14.0 29.5 20.5 17.9 47.2 16.2 31.2 63.4 17.4 29.2 43.0
Rail
Water 36.8 S S S S S S S S 30.3 29.2 77.1
Air (including truck and air) 47.0 31.9 101.6 46.9 40.4 520.2 S 38.5 S 16.8 20.8 13.6
Pipeline S S S S S S
Multiple modes 26.4 30.2 46.0 25.0 37.2 62.4 24.0 25.1 40.1 9.4 S S
Parcel, USPS or courier 27.0 32.1 52.5 27.2 43.5 100.5 21.3 24.8 28.0 10.8 S S
Truck and rail
Other multiple modes 34.8 S S 38.2 S S S S S 35.7 39.0 135.3
Other and unknown modes 36.4 36.1 188.3 31.5 S S S 46.7 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 S 37.2 S S 30.6 S 44.5 S S 29.3 18.6 15.7
Single modes S 48.8 S S 38.6 S S 16.8 S 25.5 22.1 31.1
Truck S 32.1 S S 22.7 S S 18.7 S 25.2 12.0 48.6
Rail S S S S S S S S S 31.6 31.6 S
Water S S S S S S 26.8
Air (including truck and air) S S S S 33.2 S S 32.3 S 25.6 32.2 88.4
Pipeline S S S S S S
Multiple modes 45.4 23.0 39.5 S S S S S S 22.1 11.3 16.9
Parcel, USPS or courier 34.8 22.3 13.3 S 45.8 S S 45.5 S 23.1 11.4 16.5
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S S S S 25.3 26.9 38.2
Other and unknown modes 34.3 27.4 347.3 30.6 S S 40.2 S 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 39.0 48.3 387.6 44.9 43.2 S S S S S S S
Single modes 49.5 43.7 382.4 45.8 44.4 S S S S 36.2 S S
Truck 49.5 43.6 385.0 45.8 44.5 S S S S 36.3 S S
Rail
Water
Air (including truck and air) S S S S S S S S S 31.9 31.6 87.1
Pipeline S S S S S S
Multiple modes S S S S S S S S S 28.5 31.6 154.6
Parcel, USPS or courier S S S S S S S S S 31.6 31.6 34.3
Truck and rail
Other multiple modes S S S S S S 28.0
Other and unknown modes S S S S S S S S S S 31.6 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.