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 4.9 4.6 9.1 11.9 10.8 19.0 8.6 6.4 15.4 15.3 9.4 29.0
Single modes 5.6 5.3 10.5 12.1 10.5 19.0 8.8 5.4 14.8 18.6 17.9 15.2
Truck 5.8 5.4 10.9 14.3 10.3 20.4 7.7 4.5 12.4 19.0 18.0 19.9
Rail 10.6 12.6 15.9 17.0 18.8 24.6 17.8 10.3 31.1 6.9 9.7 15.2
Water 49.5 47.4 66.8 38.7 41.7 106.1 17.0 33.3 49.1 S S S
Air (including truck and air) S 21.2 S S 23.3 S S 35.7 S 8.6 5.1 11.6
Pipeline S 25.5 S S 27.1 S S S S S S S
Multiple modes 13.2 12.5 26.1 37.7 S S 38.4 36.9 85.1 9.3 6.4 15.9
Parcel, USPS or courier 10.3 10.3 22.1 13.1 8.5 18.8 16.9 7.3 26.4 9.4 6.5 16.0
Truck and rail 34.6 30.2 55.3 39.9 S S 26.6 30.5 40.1 11.6 6.1 13.7
Other multiple modes S S S S S S S S S 23.1 S S
Other and unknown modes 31.3 16.9 53.4 21.5 26.2 47.3 25.2 31.2 52.3 24.9 22.9 26.7

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 19.2 13.4 16.3 25.6 10.3 34.8 26.0 13.7 56.0 S 14.5 S
Single modes 19.1 12.7 16.2 26.6 9.4 36.0 27.1 13.2 58.4 S 13.7 S
Truck 23.6 15.5 15.3 27.6 17.8 16.7 21.4 20.3 14.5 S 13.9 S
Rail 34.7 14.9 54.3 38.8 19.7 104.8 33.2 19.8 100.2 11.9 9.1 19.7
Water 28.6 38.0 47.2 33.5 39.7 89.2 23.1 43.9 71.9 16.3 21.0 30.6
Air (including truck and air) S S S S S S S S S 31.6 31.6 133.6
Pipeline S S S S S S
Multiple modes 48.5 49.0 19.7 S S S S S S 25.8 39.7 16.8
Parcel, USPS or courier S S S S S S 26.6
Truck and rail S S S S S S 30.3
Other multiple modes 48.5 S S S S S S S S 25.8 31.6 1.5
Other and unknown modes S S S S S S S S S 40.4 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 21.0 7.8 28.3 22.8 11.2 32.9 22.2 9.0 24.0 S 26.5 S
Single modes 20.9 7.6 28.1 22.7 10.8 33.0 20.6 7.6 22.2 S 23.8 S
Truck 21.7 8.4 29.9 24.4 12.7 37.4 25.7 10.3 30.0 S 23.1 S
Rail 23.4 12.9 23.2 27.4 13.0 34.1 29.8 16.2 33.1 14.6 5.7 10.9
Water S S S S S S 29.8
Air (including truck and air) S S S S S S S S S 31.6 31.5 12.2
Pipeline S S S S S S S S S S
Multiple modes S 35.0 S 46.7 S S S S S 25.2 13.6 57.0
Parcel, USPS or courier S 14.5 S S 38.9 S S 21.7 S 30.1 14.2 31.5
Truck and rail S 39.3 S 46.7 S S S S S 23.3 22.7 45.9
Other multiple modes
Other and unknown modes S S S 44.3 42.3 25.2 S S S 36.7 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 20.6 16.9 31.6 30.1 22.2 37.3 25.6 18.9 30.3 45.6 23.4 37.5
Single modes 22.2 17.6 33.1 30.1 23.1 38.5 26.1 21.6 35.9 42.8 23.4 43.1
Truck 22.5 17.4 33.5 31.1 23.3 38.9 28.0 22.1 38.0 41.5 23.7 41.7
Rail S S S S S S 31.6
Water 37.7 34.9 76.8 38.3 34.4 82.5 42.9 37.6 60.1 S 24.0 S
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 37.9 28.8 56.0
Parcel, USPS or courier S S S S S S S S S 45.9 28.8 62.7
Truck and rail
Other multiple modes S S S S S S 29.8
Other and unknown modes S 34.9 S S 43.8 S S 41.3 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 27.5 21.2 44.0 18.1 25.2 34.2 16.7 24.7 35.3 18.1 25.0 47.9
Single modes 28.7 20.8 44.0 19.9 22.7 32.9 18.7 23.2 35.0 19.1 26.8 51.3
Truck 22.1 16.1 28.3 20.5 18.7 29.1 23.8 36.3 49.9 22.3 27.7 50.4
Rail 23.2 S S 18.3 29.9 19.6 32.5 16.8 45.4 23.8 S S
Water S S S S S S S S S 31.6 31.6 30.7
Air (including truck and air) S S S S S S S S S 31.6 30.7 24.5
Pipeline S 26.2 S S 27.7 S S S S S S S
Multiple modes S S S S S S S S S S S S
Parcel, USPS or courier S S S S S S S S S S S S
Truck and rail S S S S S S S S S 31.6 S S
Other multiple modes
Other and unknown modes 49.7 S S 31.1 S S S S S 42.1 31.5 391.4

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 22.4 22.4 38.3 23.6 25.2 40.0 24.0 21.0 61.4 25.3 11.7 20.7
Single modes 22.8 24.7 36.6 24.1 25.1 41.4 24.0 22.4 63.3 38.5 20.1 47.2
Truck 22.7 25.4 36.6 29.3 16.5 47.1 28.7 9.1 56.6 39.5 16.9 56.0
Rail 47.2 44.2 245.2 41.9 S S S S S 49.5 S S
Water S S S S S S S S S 30.0 31.6 8.9
Air (including truck and air) S 37.3 S S S S S S S 29.8 9.4 23.3
Pipeline S S S S S S S S S S
Multiple modes 32.0 21.8 78.2 23.3 16.6 16.1 23.9 31.6 20.8 19.6 9.9 16.2
Parcel, USPS or courier 32.6 24.3 87.1 26.4 18.8 21.4 24.4 19.5 17.5 19.6 9.9 16.2
Truck and rail S S S S 48.3 S 49.0 S S 26.2 25.8 75.5
Other multiple modes
Other and unknown modes S 24.5 S S S S S 31.7 S 28.2 25.9 154.1

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 9.8 21.4 23.0 26.6 9.5 43.1 40.5 14.4 73.5 11.1 11.1 19.0
Single modes 13.3 25.6 28.1 26.7 10.5 43.7 44.3 16.6 76.1 27.0 21.0 11.0
Truck 13.4 23.7 27.8 26.9 10.2 44.9 44.9 15.7 84.6 26.0 20.4 13.0
Rail 37.5 29.9 18.2 27.4 30.7 13.0 35.6 30.8 9.7 23.3 25.8 38.2
Water
Air (including truck and air) 46.8 S S 45.7 S S 43.8 S S 23.4 8.9 25.1
Pipeline S S S S S S S S S S
Multiple modes 24.7 26.1 40.6 34.2 17.9 105.3 40.9 23.5 209.1 4.8 8.3 11.8
Parcel, USPS or courier 27.6 26.7 42.4 26.7 17.6 37.0 31.5 18.9 54.3 4.9 8.3 11.9
Truck and rail 46.8 S S S 45.4 S S 47.1 S 25.7 23.8 36.5
Other multiple modes S S S S S S 31.6
Other and unknown modes 38.4 20.8 14.7 S 29.7 S S 34.2 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 12.5 5.3 17.2 13.6 6.7 19.3 9.7 9.0 17.2 16.3 15.4 21.4
Single modes 12.9 3.9 17.4 14.6 6.0 20.1 13.0 6.7 18.1 21.1 17.5 25.1
Truck 13.6 4.8 19.8 17.3 7.9 26.1 12.0 6.9 19.5 23.3 6.9 30.3
Rail 8.4 17.4 12.6 17.4 14.7 20.3 23.0 15.1 26.9 12.3 9.2 16.9
Water S S S S S S 31.6
Air (including truck and air) 28.0 19.0 22.5 29.7 23.7 14.9 20.2 27.2 11.0 8.9 8.5 13.2
Pipeline S S S S S S S S S S
Multiple modes 21.1 36.3 38.9 S S S S 49.2 S 11.1 11.2 14.9
Parcel, USPS or courier 20.9 16.5 36.6 37.2 23.6 52.5 35.1 30.7 61.3 11.2 11.3 15.0
Truck and rail S S S 42.3 S S 42.5 S S 17.9 11.7 22.8
Other multiple modes S S S S S S S S S 31.6 S S
Other and unknown modes 33.2 20.8 57.8 30.8 S S S 38.0 S 19.0 26.2 72.4

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 9.3 7.1 17.4 18.5 7.2 31.0 18.4 8.0 31.9 15.8 9.4 47.5
Single modes 13.4 11.4 24.5 20.3 9.0 35.2 21.9 10.4 38.7 S 19.8 S
Truck 14.5 10.8 24.9 21.0 10.5 38.1 24.9 10.3 47.3 S 19.0 S
Rail 41.0 30.4 122.1 39.6 36.5 91.3 33.5 33.1 63.3 16.7 21.3 25.5
Water S S S S S S 31.6
Air (including truck and air) S 31.2 S 22.2 27.7 5.8 35.7 28.6 14.7 12.2 6.2 19.3
Pipeline S S S S S S S S S S S S
Multiple modes 25.1 11.2 48.9 25.7 26.1 60.0 24.4 30.5 65.8 11.0 9.1 24.8
Parcel, USPS or courier 19.1 16.3 45.4 23.1 35.4 79.3 27.1 34.4 99.7 11.1 8.9 25.1
Truck and rail 42.2 38.4 98.9 29.8 36.9 74.1 25.4 36.2 70.5 16.5 14.0 22.0
Other multiple modes S S S S S S S S S 27.9 31.6 24.4
Other and unknown modes 38.0 22.9 72.4 42.2 18.8 60.7 47.4 31.6 68.7 35.2 25.4 31.2

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 12.9 8.7 38.6 15.7 11.1 33.4 19.8 10.3 44.6 18.9 8.5 14.7
Single modes 13.7 10.7 47.2 15.1 11.3 32.0 16.4 10.8 37.2 28.9 19.1 22.2
Truck 14.0 9.0 48.5 15.3 8.2 39.8 18.5 9.3 48.3 25.9 19.4 20.3
Rail 36.7 S S 43.2 31.1 40.7 S 27.2 S 29.9 33.3 98.8
Water S S S S S S 31.6
Air (including truck and air) 33.4 26.6 10.7 35.7 S S 48.0 46.9 41.7 27.5 10.4 40.1
Pipeline S S S S S S
Multiple modes 14.2 16.6 20.3 S 16.9 S S 16.5 S 13.0 5.1 13.8
Parcel, USPS or courier 14.1 16.9 19.5 29.9 17.7 45.7 35.4 18.3 56.0 12.9 5.1 13.6
Truck and rail S S S S S S S S S 31.6 32.3 46.8
Other multiple modes S S S S S S S S S 31.1 31.6 17.0
Other and unknown modes 34.3 18.7 29.6 44.7 46.2 107.7 41.4 42.3 20.9 S 47.1 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 30.7 S S S 34.8 S 28.5 41.6 10.5 S 26.1 S
Single modes 40.3 S S S 35.7 S 33.7 31.9 11.4 S 39.3 S
Truck 40.1 S S S 41.9 S 29.0 33.7 7.7 S 41.1 S
Rail S S S S S S S S S 31.6 S S
Water
Air (including truck and air) S S S S S S S S S 31.6 29.7 29.1
Pipeline S S S S S S
Multiple modes S S S S S S S S S 21.6 16.7 15.7
Parcel, USPS or courier S S S S S S S S S 21.6 16.7 15.7
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S S S 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.