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 8.7 5.9 13.3 15.0 11.1 22.2 18.0 20.0 34.7 5.7 13.6 17.6
Single modes 10.2 5.4 14.9 14.6 11.3 21.8 15.9 16.2 29.0 19.7 31.8 90.0
Truck 8.7 5.9 13.1 19.0 14.3 27.9 26.3 13.8 38.0 20.8 31.3 73.9
Rail 19.5 17.7 26.1 15.3 17.6 27.6 16.7 25.5 38.8 8.1 10.0 10.9
Water
Air (including truck and air) 42.9 15.9 90.3 38.9 41.2 30.1 S 45.4 S 2.3 2.5 4.3
Pipeline S S S S S S S S S S S S
Multiple modes 11.3 9.0 16.9 33.6 S S 38.0 S S 3.5 3.7 5.0
Parcel, USPS or courier 11.6 9.4 18.0 19.4 20.8 22.6 16.1 28.3 24.4 3.3 3.7 5.0
Truck and rail 37.1 28.1 17.9 S 37.3 S 44.5 31.6 55.3 21.2 18.2 44.1
Other multiple modes S S S 44.1 S S 45.8 S S S 27.3 S
Other and unknown modes 16.3 19.1 31.2 40.2 38.0 89.8 38.5 35.3 62.7 34.4 36.5 28.0

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 23.1 11.1 23.2 20.9 20.7 22.9 18.3 21.5 24.8 30.3 14.0 65.6
Single modes 24.1 10.1 24.7 22.7 22.3 24.4 20.1 22.3 26.7 27.9 12.8 62.6
Truck 24.8 10.1 25.8 25.4 23.0 26.4 22.0 21.5 27.2 28.5 12.7 64.6
Rail 35.5 37.3 33.9 38.2 36.6 38.4 34.6 36.4 46.9 20.2 22.7 43.0
Water
Air (including truck and air) S S S S S S 28.0
Pipeline S S S S S S
Multiple modes S 30.2 S S S S S S S 22.9 14.9 25.2
Parcel, USPS or courier S 39.0 S S 26.7 S S 37.0 S 26.7 18.0 31.6
Truck and rail S 30.4 S S S S S S S 25.8 21.4 35.8
Other multiple modes
Other and unknown modes S S S S S 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 23.6 12.9 30.3 32.2 16.6 25.2 45.3 35.5 24.4 17.7 S S
Single modes 23.6 12.5 31.6 32.2 16.6 25.4 44.2 35.7 23.0 18.3 S S
Truck 20.0 10.5 29.9 28.6 17.8 31.7 31.0 19.2 37.4 19.7 S S
Rail S 36.1 S S 40.1 S S 42.2 S 19.0 13.8 19.0
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 29.4 20.4 80.2
Parcel, USPS or courier S S S S S S S S S 31.6 22.8 48.3
Truck and rail S S S S S S S S S 31.6 25.6 40.3
Other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S S S S 31.6 23.4 923.6

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 34.4 28.2 33.7 22.2 17.1 32.7 34.2 14.4 52.0 S 10.9 S
Single modes 34.6 27.6 42.1 22.9 16.7 32.5 34.1 16.9 57.7 S 12.4 S
Truck 35.2 27.7 42.7 23.3 16.7 32.9 31.1 11.4 53.2 S 11.9 S
Rail S 44.0 S S S S S S S 31.6 24.2 37.8
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S 31.1 S S 34.0 S 31.6 S S
Parcel, USPS or courier S S S S S S S S S 31.6 S S
Truck and rail S S 31.6 34.0 18.8
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 16.6 22.6 41.0 11.1 21.3 28.3 17.4 25.0 47.4 30.2 S S
Single modes 16.6 23.5 41.8 11.1 23.0 29.5 15.2 19.5 38.4 30.0 S S
Truck 27.7 31.1 52.0 29.2 40.2 42.8 S S S 34.7 S S
Rail 17.4 26.5 62.0 14.8 19.9 35.5 16.5 24.8 52.3 13.7 23.4 30.1
Water
Air (including truck and air)
Pipeline S S S S S S S S S S S S
Multiple modes 37.5 S S 38.9 S S 41.7 S S S S S
Parcel, USPS or courier S S S S S S S S S S 46.1 S
Truck and rail S S S S S S 26.2
Other multiple modes 43.3 S S 43.8 S S 45.0 S S S 29.8 S
Other and unknown modes S S S S S S S S S S 36.0 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 17.7 17.2 28.0 49.4 24.5 113.6 25.8 11.7 34.9 25.5 13.3 21.4
Single modes 23.5 20.0 32.9 S 26.7 S 26.7 11.5 39.4 45.9 34.0 121.3
Truck 25.3 19.3 34.2 S 27.4 S 27.8 13.3 45.4 S 23.8 S
Rail S S S S 37.5 S S 40.1 S 29.8 24.0 55.2
Water
Air (including truck and air) 45.4 S S S 30.0 S S 28.2 S 5.9 7.4 12.6
Pipeline S S S S S S S S S S
Multiple modes 15.7 19.9 33.6 50.0 13.9 22.6 40.9 22.3 15.0 16.2 12.7 17.7
Parcel, USPS or courier 15.7 22.8 39.7 50.0 21.2 32.2 40.9 27.0 21.1 16.2 12.7 17.7
Truck and rail S S 44.2 S S 28.2
Other multiple modes
Other and unknown modes 32.1 20.7 46.2 S 20.6 S S 38.0 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 15.9 11.1 20.7 S 11.7 S S 15.2 S 12.0 7.7 12.4
Single modes 26.8 13.9 28.7 S 11.9 S S 16.5 S 39.5 27.3 27.2
Truck 27.0 13.5 29.2 S 11.8 S S 15.4 S 42.7 27.2 34.1
Rail S S S S 45.0 S S 46.2 S 31.6 24.5
Water
Air (including truck and air) 42.4 S S 42.3 S S 45.3 S S 18.8 12.0 27.1
Pipeline S S S S S S
Multiple modes 16.3 19.4 25.7 23.4 24.0 25.2 25.1 20.3 24.6 8.2 3.6 8.8
Parcel, USPS or courier 16.3 19.4 25.6 24.4 24.1 24.8 25.1 20.4 24.7 7.8 3.6 8.4
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S 31.6
Other and unknown modes 34.0 27.0 171.7 48.0 38.5 148.0 38.3 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 13.5 9.7 18.9 36.7 21.2 61.5 28.1 10.1 32.5 12.7 16.4 36.3
Single modes 12.2 11.0 16.6 36.6 21.9 62.9 28.7 11.3 35.4 31.2 12.1 54.4
Truck 12.0 10.2 16.2 37.8 22.3 67.3 27.7 10.1 44.5 45.6 13.5 67.4
Rail S 27.9 S 43.1 22.9 38.3 44.4 19.6 33.0 27.9 13.7 27.3
Water
Air (including truck and air) 33.9 33.4 50.8 S S S S S S 11.9 7.2 14.3
Pipeline S S S S S S
Multiple modes 27.8 16.0 64.2 31.6 40.3 7.3 38.0 23.1 14.6 11.6 10.4 20.8
Parcel, USPS or courier 28.1 17.3 76.8 31.4 17.6 66.2 36.5 21.4 87.4 11.6 10.4 20.7
Truck and rail S 32.1 S 45.8 44.3 1.5 50.0 31.9 6.2 26.6 49.4 124.3
Other multiple modes S S S S S S 29.8
Other and unknown modes 36.3 22.1 80.8 S 34.5 S 48.0 43.4 46.9 43.5 34.6 65.7

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 17.4 12.2 26.4 S 26.8 S S 20.2 S 8.5 11.4 10.9
Single modes 22.2 11.8 33.0 S 33.6 S S 26.4 S 13.9 30.0 76.3
Truck 15.7 13.8 22.7 S 34.5 S S 28.2 S 20.3 33.7 107.7
Rail S S S S S S S S S 31.6 28.3 7.5
Water
Air (including truck and air) S 17.1 S 23.8 23.6 28.9 24.0 24.3 39.5 3.6 2.6 5.7
Pipeline S S S S S S
Multiple modes 23.6 18.1 36.2 20.7 12.7 18.5 25.7 15.1 22.1 12.3 5.8 10.1
Parcel, USPS or courier 23.6 18.1 36.3 20.9 13.4 19.6 26.5 15.4 23.3 10.4 5.8 8.8
Truck and rail S S S S S S 29.8
Other multiple modes S S S S S S 31.6
Other and unknown modes 36.2 27.2 31.2 36.9 38.2 27.8 39.1 49.1 106.1 39.2 29.5 37.8

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 16.2 20.4 48.4 27.8 25.7 52.8 15.3 21.3 34.3 10.5 11.1 16.8
Single modes 16.7 24.5 63.1 29.0 27.1 55.5 16.2 26.6 41.7 35.4 14.3 42.2
Truck 16.1 25.1 61.0 29.9 29.6 65.1 17.2 29.4 55.9 35.7 13.2 38.6
Rail S S S S S S S 48.2 S 37.3 35.1 67.0
Water
Air (including truck and air) S S S 35.2 39.7 79.3 30.5 37.2 73.8 13.7 10.5 21.6
Pipeline S S S S S S
Multiple modes 22.5 30.9 35.2 S 44.9 S S 47.0 S 3.3 5.8 6.6
Parcel, USPS or courier 24.1 32.0 36.7 32.1 S S 29.7 S S 3.2 5.8 6.6
Truck and rail S S S S S S S S S 32.9 21.3 45.6
Other multiple modes S S S S S S 31.1
Other and unknown modes 39.6 20.3 79.4 S 36.3 S 40.7 48.9 66.7 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 37.3 42.8 31.2 49.6 41.8 340.8 S S S 39.2 27.1 31.7
Single modes 30.4 S S S 43.3 S S S S S 30.5 S
Truck 35.5 S S S 43.3 S S S S S 31.4 S
Rail S S S S S S 31.6
Water
Air (including truck and air) S S S S S S S S S 28.0 31.6 42.9
Pipeline S S S S S S
Multiple modes S S S S S S S S S 38.1 27.0 27.6
Parcel, USPS or courier 40.7 S S S S S S S S 31.9 27.0 29.8
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S 31.6
Other and unknown modes S 47.4 S S S S S S S 31.0 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.