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 13.6 14.6 19.5 8.2 11.8 15.3 12.8 12.6 21.5 7.4 10.0 12.0
Single modes 16.9 16.1 22.2 8.9 12.0 15.9 9.4 14.1 18.7 14.5 15.2 13.5
Truck 17.6 16.0 23.1 7.4 13.4 14.6 10.5 5.8 13.5 15.0 14.0 14.4
Rail 39.6 33.0 22.8 26.0 20.8 52.1 35.0 14.9 74.7 12.0 S S
Water 29.2 28.4 173.7 30.3 32.8 142.8 38.1 45.9 202.8 19.5 S S
Air (including truck and air) 16.5 42.8 16.9 S 26.4 S S 35.8 S 8.4 9.6 13.7
Pipeline 33.1 S S 39.0 S S S S S S S S
Multiple modes 16.1 12.6 22.7 35.2 15.1 57.4 S 18.3 S 5.4 8.6 12.0
Parcel, USPS or courier 16.3 12.8 22.7 13.3 12.8 16.1 9.1 19.4 18.8 5.4 8.6 12.0
Truck and rail S 27.3 S 48.0 34.8 61.5 47.9 34.0 76.6 20.3 31.3 76.2
Other multiple modes 44.2 48.9 189.0 S 43.1 S S S S S 27.4 S
Other and unknown modes 21.9 11.3 21.5 38.4 25.1 42.9 S 20.8 S S 27.3 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 34.9 17.6 46.6 29.4 27.0 88.6 43.4 30.2 146.3 S S S
Single modes 38.6 18.8 50.2 29.5 27.8 89.5 45.5 34.7 170.2 S S S
Truck 38.6 18.8 50.2 29.5 27.8 89.5 45.5 34.7 170.2 S S S
Rail
Water
Air (including truck and air) S S S S S S 30.5
Pipeline S S S S S S
Multiple modes S S S S S S S S S 48.6 S S
Parcel, USPS or courier 48.1 S S S S S S S S 31.6 24.3 23.5
Truck and rail S S S S S S S S S 31.6 S S
Other multiple modes
Other and unknown modes S S S S 41.6 S S S S 30.7 23.5 0.4

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 10.2 11.1 18.0 19.5 16.2 27.8 22.7 7.8 33.7 S 22.3 S
Single modes 10.8 11.2 18.7 19.6 16.1 28.1 23.6 6.1 36.4 S 26.5 S
Truck 10.7 11.4 18.8 19.5 16.1 28.2 23.5 7.4 38.3 S 26.9 S
Rail 47.8 38.6 32.0 S 41.0 S S S S 24.9 42.0 40.5
Water
Air (including truck and air) S S S S S S S S S 28.0 24.1 22.3
Pipeline S S S S S S
Multiple modes S 25.8 S 47.1 48.8 19.1 S S S 16.4 S S
Parcel, USPS or courier S 45.4 S 24.9 S S 29.9 36.8 137.6 17.0 S S
Truck and rail S S S S S S S S S 29.8 21.2 63.1
Other multiple modes S S S S S S S S S 31.6 31.6 134.5
Other and unknown modes S 42.8 S S S S S S S 30.3 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 16.2 S 19.5 27.9 25.3 45.1 35.1 84.7 24.7 19.6 22.0
Single modes S 16.3 S 20.3 28.3 25.9 45.2 36.6 94.5 25.7 18.1 23.3
Truck S 16.3 S 20.2 29.2 26.7 46.8 38.5 100.3 25.9 18.0 23.4
Rail S 44.7 S S 45.2 S S S S 33.6 28.5 67.3
Water S S S S S S S S S 31.6 31.6 92.7
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S 35.4 S S S S S S S 28.2 29.5 20.0
Parcel, USPS or courier S 33.0 S S 35.4 S S S S 28.2 25.9 16.2
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 39.7 47.1 2.7

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 14.8 21.0 42.0 20.9 21.8 38.9 20.3 S S S S S
Single modes 14.9 21.1 42.1 21.0 21.9 39.1 20.4 S S 49.3 S S
Truck 21.9 16.0 35.7 26.4 23.8 33.8 21.9 20.5 28.3 44.0 S S
Rail S S S 49.1 S S S S S 24.2 31.4 43.8
Water 29.3 33.3 231.4 30.8 36.1 188.7 38.8 38.5 402.5 21.6 24.9 34.1
Air (including truck and air) S S S S S S S S S 31.6 28.7 22.4
Pipeline 33.1 S S 39.1 S S S S S S S S
Multiple modes S S S S S S S S S 30.1 S S
Parcel, USPS or courier S S S 47.8 S S S S S 32.3 S S
Truck and rail S S S S S S S S S 31.6 31.6 149.5
Other multiple modes S S S S S S S S S 38.8 31.6 747.4
Other and unknown modes S 40.5 S S S S S 37.3 S 31.1 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 42.3 10.3 59.1 20.5 14.3 28.3 35.7 20.3 85.6 7.0 11.2 14.1
Single modes S 8.5 S 21.4 14.8 26.2 30.2 21.0 53.0 23.0 9.2 23.5
Truck S 8.4 S 20.8 14.5 23.1 29.7 20.9 47.7 24.2 10.7 28.1
Rail 47.6 33.1 68.2 S 44.1 S S 33.5 S 14.9 35.2 70.5
Water S S S S S S S S
Air (including truck and air) 33.1 24.3 36.5 S 22.9 S S 23.1 S 14.0 8.3 11.7
Pipeline S S S S S S S S S S S S
Multiple modes 37.5 22.9 38.0 S 20.3 S S 21.0 S 9.9 7.9 12.8
Parcel, USPS or courier 37.4 23.1 37.6 22.7 25.0 23.9 26.1 31.4 28.1 9.9 8.0 12.8
Truck and rail S 33.3 S S 36.3 S S 35.7 S 25.5 18.7 21.6
Other multiple modes S S S S S S S S S 29.8 28.5 17.3
Other and unknown modes 46.0 26.8 40.8 S 16.3 S S 27.1 S 29.9 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 16.3 S S 20.9 21.5 18.2 27.0 21.6 20.3 13.5 12.9 19.1
Single modes 14.9 S S 22.3 22.4 18.8 29.7 24.1 22.5 20.7 15.2 22.0
Truck 15.0 S S 22.4 21.3 18.8 29.9 24.2 22.8 23.7 16.1 22.5
Rail S S S S S S S S S 44.1 S S
Water S S S S S S S S
Air (including truck and air) 38.2 S S 41.0 S S S 45.7 S 10.2 S S
Pipeline S S S S S S
Multiple modes 33.9 33.3 27.0 30.4 32.2 24.8 35.3 49.8 32.3 8.9 12.7 17.7
Parcel, USPS or courier 33.8 33.3 26.9 30.0 32.2 24.1 35.5 49.8 32.1 8.9 12.7 17.7
Truck and rail
Other multiple modes S S S S S S S S
Other and unknown modes 31.2 26.3 34.4 32.8 38.9 78.7 S 39.8 S S 39.3 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 13.4 20.7 14.1 42.6 24.4 59.3 21.8 14.8 20.5 11.4 12.1 16.8
Single modes 18.2 24.3 15.3 43.5 24.8 63.8 23.4 16.2 24.6 20.2 18.9 24.4
Truck 18.8 25.0 15.8 44.1 24.7 63.6 23.4 15.3 21.1 22.3 20.3 23.3
Rail 31.7 47.4 78.8 43.3 S S 45.6 S S 18.6 45.6 39.6
Water S S S S S S S S
Air (including truck and air) 35.9 S S S S S S S S 12.8 9.0 16.4
Pipeline S S S S S S S S S S
Multiple modes 13.5 21.0 25.6 23.8 39.2 14.5 24.9 49.1 8.1 14.9 12.7 22.6
Parcel, USPS or courier 13.5 22.3 27.8 20.8 19.1 17.7 27.3 20.0 19.2 14.9 12.7 22.6
Truck and rail S S 48.4 S S 25.3
Other multiple modes S S S S S S S S S 35.5 30.0 28.0
Other and unknown modes 25.4 22.9 37.0 34.5 42.3 17.6 S 32.2 S 26.5 21.8 12.8

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 12.2 8.3 14.0 15.4 9.7 15.2 16.6 15.4 16.7 13.9 10.0 17.5
Single modes 9.7 12.3 12.1 18.3 11.5 17.3 22.4 18.0 19.3 36.4 20.2 29.3
Truck 10.9 10.9 13.8 18.4 13.0 21.4 22.6 13.2 22.0 S 20.9 S
Rail S 47.6 S S 42.4 S S S S 30.2 S S
Water S S S S S S S S S 33.2 31.6 85.6
Air (including truck and air) 22.5 18.7 17.6 24.2 28.8 4.3 35.2 29.3 5.5 9.1 10.4 14.2
Pipeline S S S S S S
Multiple modes 23.4 12.6 36.4 35.1 14.0 43.6 22.4 13.6 32.2 8.8 7.6 13.7
Parcel, USPS or courier 23.3 12.6 36.1 38.8 14.6 45.3 27.1 13.9 33.7 8.8 7.6 13.7
Truck and rail S S S S S S 27.9
Other multiple modes S S S S S S S S S 30.8 29.8 61.4
Other and unknown modes 37.4 27.2 30.1 S 46.0 S S S S S 29.4 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 9.2 13.7 30.1 16.1 21.8 48.0 22.0 24.9 40.8 12.4 14.7 21.9
Single modes 10.8 15.9 34.2 16.4 22.7 49.1 22.8 26.6 39.1 22.0 20.5 29.0
Truck 11.3 16.1 35.1 16.4 24.5 56.3 22.8 31.4 53.9 26.6 22.6 32.1
Rail 32.4 S S 38.5 38.4
Water S S S S S S S S S 31.6 33.3 55.6
Air (including truck and air) S 35.5 S 43.6 44.3 76.4 S 32.7 S 20.1 14.2 24.5
Pipeline S S S S S S S S S S
Multiple modes 30.7 21.0 71.4 27.5 24.1 80.8 35.5 21.5 113.2 10.5 15.5 24.1
Parcel, USPS or courier 31.2 21.0 71.0 26.7 24.2 64.6 31.2 21.5 73.8 10.5 15.5 24.1
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S S S S 31.6 30.8 0.9
Other and unknown modes S 23.4 S 41.2 44.2 157.1 S S S S 29.0 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 46.1 S S S 49.4 S 45.1 S S S 31.7 S
Single modes S S S S 49.6 S 45.5 S S S 34.6 S
Truck S S S S S S 45.5 S S S 30.1 S
Rail S S S S S S 31.6
Water
Air (including truck and air) S S S S S S 27.4
Pipeline S S S S S S
Multiple modes S 42.5 S 44.1 34.3 29.6 41.8 46.0 14.2 S 29.1 S
Parcel, USPS or courier S 42.5 S 44.1 34.3 29.6 41.8 46.0 14.2 S 29.1 S
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.