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 3.9 4.8 7.2 6.5 6.2 11.3 17.8 10.9 23.8 11.8 17.0 21.7
Single modes 3.8 4.2 7.0 6.7 5.0 11.6 19.1 11.9 26.1 15.2 34.6 29.9
Truck 5.8 5.6 8.5 17.2 13.7 23.7 S 16.3 S 18.2 40.6 44.5
Rail 13.8 14.3 18.3 10.8 24.2 19.8 12.2 20.3 20.1 5.2 5.0 8.0
Water 10.1 10.6 30.9 15.4 13.4 45.4 10.3 23.0 31.0 S 18.6 S
Air (including truck and air) 45.5 35.2 16.5 25.8 35.7 27.4 23.4 31.5 34.3 6.6 3.3 8.6
Pipeline 17.7 10.6 26.9 16.8 12.7 25.2 S S S S S S
Multiple modes 13.0 9.8 19.9 30.8 41.5 32.1 41.4 29.5 59.9 8.2 6.0 10.6
Parcel, USPS or courier 15.2 10.8 27.7 16.1 11.8 39.7 23.2 14.3 60.2 8.6 6.0 10.9
Truck and rail 37.7 23.1 27.8 44.6 27.5 31.4 35.2 20.8 21.0 18.4 6.5 16.9
Other multiple modes 43.8 S S 36.5 46.7 35.5 45.5 35.9 75.1 39.7 30.2 75.7
Other and unknown modes 41.9 31.1 22.1 S 36.7 S S 29.0 S 27.9 24.7 63.2

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 21.0 20.6 43.5 22.2 23.8 74.9 31.3 14.9 82.7 S S S
Single modes 20.9 20.9 83.7 22.2 32.0 230.8 31.9 23.8 171.3 S 43.5 S
Truck 21.1 14.7 49.0 32.8 33.6 333.9 35.3 27.3 135.6 S 44.0 S
Rail S 45.4 S S 44.3 S S S S 31.6 27.0 46.5
Water 30.5 41.8 179.2 29.4 41.1 283.0 31.9 38.1 170.9 S 27.6 S
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S 41.2 S S 49.5 S S 49.6 S 25.5 30.6 130.9
Parcel, USPS or courier S S S S S S 46.7 S S 24.9 39.3 148.6
Truck and rail S S S S S S 31.6
Other multiple modes S 42.2 S S 49.6 S S 49.6 S 31.6 25.8 S
Other and unknown modes S 46.8 S S 45.4 S S 42.2 S 29.7 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 7.6 11.1 11.9 16.5 19.8 24.0 30.3 25.9 48.7 37.2 42.8 41.7
Single modes 7.4 10.8 11.9 16.6 18.9 23.8 30.2 23.4 50.4 39.1 29.8 48.8
Truck 9.1 11.0 13.3 18.1 18.0 24.0 27.2 15.1 33.0 40.2 29.8 49.1
Rail 39.1 18.3 45.1 43.9 32.8 101.5 48.9 36.8 107.1 17.9 14.4 20.4
Water S S S S S S S S S 30.6 S S
Air (including truck and air) S S S S S S S S S 31.6 31.6 21.2
Pipeline S S S S S S
Multiple modes S S S 47.6 S S S S S 27.7 31.0 60.5
Parcel, USPS or courier 42.4 S S S S S S S S 28.9 26.4 57.9
Truck and rail S S S S S S S S S 31.6 31.0 35.9
Other multiple modes S S S S S S S S S 27.9 31.6 71.1
Other and unknown modes 46.2 40.0 9.4 S 37.6 S S 40.0 S S 35.4 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 34.7 25.8 40.0 35.2 32.9 44.4 33.4 S S 45.6 39.8 94.2
Single modes 35.1 27.6 41.0 36.9 33.5 43.2 33.3 S S 32.5 47.3 66.9
Truck 37.7 35.9 62.2 38.1 43.0 64.1 29.9 34.6 39.9 31.8 39.7 63.8
Rail S S S S S S S S S 27.0 28.4 63.3
Water S 49.0 S S S S S S S 27.0 27.1 57.4
Air (including truck and air)
Pipeline S S S S S S S S S S
Multiple modes S S S S S S S S S 31.6 34.2 17.8
Parcel, USPS or courier S S S S S S S S S 31.6 31.6 10.1
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S S S
Other and unknown modes 45.5 S S 28.4 42.5 339.4 S S S 44.7 28.3 245.8

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 8.6 5.5 14.0 8.7 8.9 16.7 9.3 21.4 34.6 S S S
Single modes 8.9 5.7 14.9 8.8 9.6 17.9 10.0 23.0 35.6 S S S
Truck 18.4 8.4 15.1 16.7 9.0 13.3 37.7 16.2 18.3 S S S
Rail 24.6 15.7 18.6 20.6 23.2 16.7 49.9 16.4 49.1 11.3 11.7 15.1
Water 13.6 20.2 63.9 13.0 26.6 65.8 13.7 28.1 64.3 S 16.8 S
Air (including truck and air)
Pipeline 18.6 12.0 27.4 17.7 14.8 25.9 S S S S S S
Multiple modes S S S 41.3 S S 49.6 S S 37.6 47.9 96.6
Parcel, USPS or courier S S S S S S S S S 31.9 30.4 51.4
Truck and rail S S S S S S 29.4
Other multiple modes S S S 41.3 S S 49.6 S S 26.6 36.9 93.9
Other and unknown modes S 45.0 S S 33.7 S S S S 27.6 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 13.2 7.2 17.0 21.7 12.6 24.8 40.8 9.5 53.3 18.4 13.1 39.6
Single modes 11.4 7.0 15.0 21.5 11.6 25.6 41.2 9.7 56.4 17.9 16.5 42.3
Truck 16.8 10.7 23.8 S 24.7 S S 27.1 S 18.1 17.6 51.4
Rail 12.0 7.3 13.7 9.2 6.8 9.7 9.4 8.5 11.4 2.9 4.1 5.6
Water 13.7 14.4 19.6 12.1 16.3 15.0 19.0 22.7 23.2 43.6 17.6 30.8
Air (including truck and air) S 42.6 S S 44.3 S S 41.0 S 26.7 11.5 27.9
Pipeline 24.9 42.5 84.5 23.3 37.2 91.9 S S S S S S
Multiple modes 31.3 18.2 57.0 37.9 33.7 16.1 39.8 32.0 16.2 16.1 17.0 33.9
Parcel, USPS or courier 39.0 25.6 165.2 S 49.0 S S 33.9 S 15.4 17.9 35.0
Truck and rail S 33.9 S 47.5 36.1 13.8 44.2 34.4 14.9 21.9 15.8 31.2
Other multiple modes 40.1 39.9 43.3 47.6 47.8 19.9 S 46.5 S S 28.2 S
Other and unknown modes S 29.3 S S 48.1 S S 35.4 S S 17.8 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 14.3 20.3 18.7 12.1 38.0 19.9 6.5 37.7 23.0 32.9 10.9 11.5
Single modes 14.6 21.6 19.9 12.3 38.4 20.0 7.3 38.4 23.4 34.1 21.0 20.9
Truck 20.2 17.1 21.5 17.2 32.7 19.2 8.9 28.9 21.1 38.6 23.8 20.0
Rail 10.7 39.4 26.2 11.3 S S 14.3 43.9 25.2 4.9 10.1 12.4
Water S S S S S S S S S 30.0 29.8 6.9
Air (including truck and air) S S S S S S S S S 21.7 31.4 55.8
Pipeline S S S S S S
Multiple modes 29.8 26.2 17.9 S 32.2 S S 33.9 S 15.4 5.1 8.6
Parcel, USPS or courier 34.3 30.8 16.3 22.4 28.0 16.5 35.9 31.7 7.7 16.1 5.2 8.9
Truck and rail S 40.7 S S 37.9 S S 38.0 S 30.9 23.7 19.4
Other multiple modes S S S S S S S S S 32.0 29.8 14.7
Other and unknown modes 41.8 25.0 52.7 37.2 26.8 25.5 45.7 41.7 18.5 S 39.9 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 7.8 8.0 11.6 S 42.1 S 13.2 34.2 22.8 19.8 22.4 23.7
Single modes 7.8 9.3 12.3 17.3 43.9 33.3 16.4 27.1 25.4 30.7 38.0 36.3
Truck 9.0 9.3 12.1 20.0 43.3 33.1 16.4 16.3 18.3 29.1 40.3 35.2
Rail S 39.1 S S S S 49.2 S S 23.9 22.9 22.9
Water S S S 38.1 S S 40.5 S S S 41.5 S
Air (including truck and air) S 25.9 S S 32.4 S S 31.1 S 21.0 11.2 39.9
Pipeline S S S S S S
Multiple modes 20.8 16.2 28.3 26.2 S S 34.0 S S 24.8 11.2 20.6
Parcel, USPS or courier 20.8 17.3 34.4 26.7 17.1 48.7 39.1 13.4 78.0 25.4 11.3 21.0
Truck and rail S S S S S S 27.9
Other multiple modes S S S S S S S S S 32.3 31.2 232.4
Other and unknown modes 39.6 27.8 65.8 S 28.7 S S 31.7 S S 28.4 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 31.0 24.1 44.2 35.6 17.6 56.2 S 32.4 S 47.2 28.9 67.6
Single modes 39.2 27.4 56.2 38.2 19.3 61.0 S 36.5 S S S S
Truck 23.4 12.0 31.5 25.9 21.1 41.7 27.9 37.9 53.5 S S S
Rail S S S S S S S S S 28.1 22.3 36.6
Water S S S S S S S S S S 27.9 S
Air (including truck and air) S 30.2 S S S S S S S 24.5 11.7 28.9
Pipeline S S S S S S
Multiple modes 18.9 21.0 29.2 40.9 25.8 115.9 S 16.7 S 14.1 14.9 15.3
Parcel, USPS or courier 21.5 21.0 28.8 48.8 26.2 112.4 S 16.8 S 13.6 14.9 15.0
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 43.5 29.8 24.2 S S S S S S S 41.4 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 12.8 14.6 34.9 24.8 24.2 35.0 41.8 17.7 45.0 21.8 23.9 35.0
Single modes 17.4 15.2 34.2 26.9 24.5 35.5 44.3 18.0 45.7 44.4 27.1 9.8
Truck 17.7 13.5 36.6 24.8 29.1 37.0 23.0 23.9 27.5 49.2 36.7 45.0
Rail S 49.0 S S S S S S S 31.6 30.2 106.6
Water S S S S S S S S S S 29.8 S
Air (including truck and air) 43.4 44.2 2.5 49.0 41.0 11.0 S 40.7 S 22.1 18.6 36.1
Pipeline S S S S S S
Multiple modes 22.9 23.6 102.9 38.7 32.1 165.3 46.7 S S 16.4 22.8 54.5
Parcel, USPS or courier 22.9 23.4 104.4 38.7 32.0 198.9 46.7 46.0 352.5 16.4 22.9 54.6
Truck and rail S S S S S S 30.0
Other multiple modes
Other and unknown modes 47.4 37.0 270.9 S S S S S S 36.1 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 14.5 46.1 15.6 23.4 S S S S S S S S
Single modes 14.3 S S 24.6 S S S S S S S S
Truck 25.0 35.0 17.7 25.7 S S S S S S S S
Rail 47.2 S S S S S S S S 28.0 31.6 127.7
Water S S S S S S S S S 31.6 31.5 3.4
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S 43.0 S S S S S S S S 32.0 S
Parcel, USPS or courier S S S S S S S S S S 28.1 S
Truck and rail
Other multiple modes S S S S S S S S S 31.6 31.6 4.2
Other and unknown modes S S S S S S S S S 31.5 36.3 7.5

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.