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 18.9 5.2 28.4 11.5 9.0 12.2 28.1 21.0 37.9 8.9 8.3 14.5
Single modes 20.9 5.1 33.3 11.8 9.1 12.3 30.0 23.0 40.6 11.7 11.0 14.9
Truck 19.2 4.5 31.7 11.4 10.4 13.3 26.5 7.0 38.9 9.0 10.6 16.2
Rail S 42.6 S S S S S S S 33.5 10.5 43.4
Water S S S S 43.1 S S S S S S S
Air (including truck and air) S 20.6 S 30.5 S S 49.4 S S 5.8 2.3 6.5
Pipeline S S S S S S S S S S
Multiple modes 18.5 11.7 25.6 26.1 10.8 38.2 28.1 14.4 29.2 5.0 7.5 10.7
Parcel, USPS or courier 18.9 12.1 26.4 28.5 12.5 46.7 14.7 15.0 21.2 5.0 7.5 10.7
Truck and rail S S S S 22.2 S S 24.1 S 29.9 19.8 29.0
Other multiple modes S 30.2 S S 30.5 S S 46.6 S 41.7 S S
Other and unknown modes 16.9 32.4 48.5 17.6 14.9 48.3 35.1 28.4 76.0 38.8 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 18.1 15.3 27.4 31.1 37.8 30.2 31.7 25.5 35.6 22.3 33.3 54.3
Single modes 18.6 16.4 29.5 31.3 38.7 31.3 32.6 32.0 49.6 30.9 34.0 46.8
Truck 18.6 16.7 29.9 31.4 38.7 31.3 34.8 32.6 49.3 25.7 35.8 45.1
Rail S S S S S S 31.6
Water S S S S S S 31.6
Air (including truck and air) 45.7 S S S S S S S S 24.3 26.5 73.2
Pipeline S S S S S S
Multiple modes S 33.6 S S 37.3 S S 40.6 S 31.0 29.6 26.9
Parcel, USPS or courier S S S S S S S S S 31.9 27.1 32.7
Truck and rail 40.7 41.4 41.4 21.1
Other multiple modes S 33.7 S S 37.7 S S 37.7 S 31.6 23.6 34.9
Other and unknown modes S 48.0 S S 44.3 S S S S 33.0 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 11.1 12.3 14.7 14.6 18.0 17.0 31.2 15.3 38.0 33.9 26.8 113.3
Single modes 12.0 12.0 14.7 14.5 17.8 16.7 32.4 15.4 38.4 13.8 13.1 23.9
Truck 12.0 12.0 14.7 14.5 17.8 16.7 32.4 15.2 38.6 13.8 13.1 23.9
Rail S S S S S S 27.9
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 35.9 26.3
Pipeline S S S S S S
Multiple modes S S S S S S S S S 49.9 S S
Parcel, USPS or courier S S S S S S S S S 49.9 S S
Truck and rail
Other multiple modes S S S S S S 31.6
Other and unknown modes 44.2 S S S S S S S 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 41.2 23.1 43.9 11.5 18.8 15.8 39.9 20.6 55.8 22.3 37.8 26.7
Single modes 41.0 21.8 44.4 12.0 18.8 15.6 40.0 20.6 56.0 21.7 41.7 31.0
Truck 40.9 21.9 44.0 11.9 18.4 15.5 37.5 20.6 51.2 21.0 41.6 30.0
Rail S S S S S S S S S 31.6 31.6 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 31.6 26.8 20.6
Parcel, USPS or courier S S S S S S S S S 31.6 28.8 21.4
Truck and rail
Other multiple modes S S S S S S 31.6
Other and unknown modes S S S S 46.4 S S S S 26.1 35.2 7.5

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 35.3 21.1 59.6 47.8 11.6 46.8 42.8 44.9 28.3 S 27.5 S
Single modes 35.4 21.1 59.6 47.7 11.7 46.8 42.4 44.9 27.4 S 21.4 S
Truck 35.4 21.5 74.1 47.7 14.5 56.2 42.4 S S S 21.3 S
Rail
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
Multiple modes S S S S S S S S S 26.3 S S
Parcel, USPS or courier S S S S S S S S S 26.3 S S
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S S S 46.6 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 19.2 20.3 31.2 21.1 12.4 36.7 22.7 12.4 38.7 22.1 22.7 28.7
Single modes 25.3 20.2 38.5 22.2 12.5 36.0 19.3 14.1 33.3 24.0 21.5 23.3
Truck 27.2 21.7 41.2 23.4 13.4 38.1 21.5 15.0 35.6 26.5 22.0 40.5
Rail S S S S S S S S S 33.8 31.0 48.8
Water S S S S S S S S S 31.6 31.6 401.2
Air (including truck and air) 44.5 17.3 60.6 43.8 29.9 10.9 36.9 26.2 7.4 13.6 3.6 15.3
Pipeline S S S S S S
Multiple modes 21.8 39.1 41.9 S 27.3 S S 19.9 S 22.8 25.4 34.7
Parcel, USPS or courier 23.8 39.3 41.2 S 33.8 S 26.5 25.8 35.6 22.9 25.4 34.6
Truck and rail S 39.9 S S 40.1 S S 40.4 S 30.4 28.3 56.0
Other multiple modes S S S S S S 31.6
Other and unknown modes 36.5 30.0 52.7 35.7 36.3 89.8 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 27.4 10.0 53.0 32.8 8.4 52.9 S 12.6 S 11.9 19.3 30.8
Single modes 32.1 5.7 64.5 33.6 8.3 54.6 S 13.8 S 14.6 16.2 14.9
Truck 32.5 5.4 66.1 30.7 8.4 48.8 S 8.2 S 15.2 20.0 21.2
Rail S S S S S S S S S 38.0 29.9 18.8
Water
Air (including truck and air) 35.0 S S 30.4 S S 32.5 S S 29.2 11.2 22.4
Pipeline S S S S S S
Multiple modes 20.5 7.3 38.5 15.6 8.0 22.2 25.5 19.4 29.6 7.9 17.9 27.5
Parcel, USPS or courier 20.6 7.6 39.2 16.1 11.3 31.3 25.9 13.0 44.2 7.9 17.9 27.5
Truck and rail S S S S S S S S S S 29.8 S
Other multiple modes 35.6 36.3 S S S S
Other and unknown modes 39.9 S S 26.0 35.6 61.7 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 13.8 8.8 16.7 35.2 21.8 13.8 21.0 S S 10.5 20.5 45.2
Single modes 17.1 9.4 21.0 36.4 22.1 14.0 25.0 S S 18.0 16.9 44.0
Truck 16.0 9.6 19.8 33.3 22.8 13.0 25.5 15.4 13.5 21.3 18.8 54.2
Rail S S S S S S S S S 31.6 35.9 8.2
Water
Air (including truck and air) S 28.7 S 30.5 36.1 17.9 41.0 35.6 15.4 13.2 10.2 15.6
Pipeline S S S S S S
Multiple modes 14.8 12.4 16.4 16.2 27.4 10.9 18.9 S S 13.8 24.2 55.9
Parcel, USPS or courier 14.8 12.6 16.5 16.0 29.2 11.9 19.0 S S 13.8 24.2 55.9
Truck and rail S S S S S S 27.9
Other multiple modes S S S S S S 31.6
Other and unknown modes 43.4 27.7 36.4 S 26.8 S S 30.1 S 32.8 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 48.5 11.5 77.5 16.8 22.8 17.7 31.9 15.6 31.9 17.0 18.3 31.4
Single modes S 11.0 S 18.8 25.9 17.5 34.2 19.4 37.1 19.0 21.1 90.5
Truck S 10.7 S 18.7 26.8 18.1 33.6 21.2 39.7 30.3 26.0 139.0
Rail S S S S S S 29.8
Water S S S S S S S S S 31.6 31.6 1.3
Air (including truck and air) S 24.2 S 47.9 31.8 21.4 S 19.2 S 8.1 6.4 11.8
Pipeline S S S S S S
Multiple modes 32.6 14.9 46.3 30.9 10.6 32.7 31.8 15.0 32.5 12.8 13.3 16.9
Parcel, USPS or courier 32.6 14.9 46.3 30.9 10.6 32.7 32.3 15.0 32.5 12.8 13.3 16.9
Truck and rail
Other multiple modes S S S S S S 32.3
Other and unknown modes 30.4 17.4 62.6 S 36.8 S 44.2 S S 46.3 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 8.6 9.5 26.4 18.1 27.0 83.4 20.0 15.3 49.9 12.5 8.7 13.5
Single modes 10.3 11.7 38.2 18.4 28.4 86.2 24.6 16.0 60.7 23.3 25.7 26.9
Truck 10.3 11.8 38.9 18.4 28.6 87.8 24.6 16.6 65.0 23.0 27.2 30.0
Rail S S S S 41.2 23.4
Water
Air (including truck and air) S 30.1 S S 49.6 S S 45.0 S 32.2 9.2 32.7
Pipeline S S S S S S
Multiple modes 12.9 13.5 17.8 23.8 16.5 38.3 23.4 20.1 37.2 8.8 4.7 10.3
Parcel, USPS or courier 12.9 14.8 20.1 23.5 17.5 44.6 23.1 22.1 44.0 8.8 4.7 10.3
Truck and rail S S S S S S S S S 31.6 29.9 18.8
Other multiple modes S S S S S S S S S S 30.9 S
Other and unknown modes 48.0 31.2 334.6 40.8 34.4 494.4 S 48.0 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 37.0 S S 48.7 S 39.5 46.0 8.2 34.3 S S
Single modes S 41.3 S S 49.3 S 41.6 47.6 8.5 S S S
Truck S 41.3 S S 49.3 S 43.4 47.6 8.2 S S S
Rail
Water
Air (including truck and air) S S S S S S 30.0
Pipeline S S S S S S
Multiple modes 45.8 S S S 39.0 S S 37.2 S 22.9 19.3 28.8
Parcel, USPS or courier 45.8 S S S 39.0 S S 37.2 S 22.9 19.3 28.8
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S S 31.6 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.