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 5.7 8.0 11.7 6.4 8.4 7.7 11.7 8.4 17.0 8.3 11.6 11.5
Single modes 5.9 8.1 12.4 6.8 8.9 8.4 13.2 7.2 18.0 7.7 15.9 13.3
Truck 5.7 7.7 12.4 7.8 10.0 8.8 11.6 5.2 14.4 8.0 16.6 14.4
Rail 8.6 12.5 10.2 20.9 16.3 36.2 29.3 25.3 50.2 12.6 28.3 41.3
Water S S S 48.0 S S S S S 33.7 34.2 180.7
Air (including truck and air) 40.7 41.7 30.7 27.5 25.1 11.9 22.9 27.3 12.5 3.9 4.6 6.4
Pipeline 32.5 34.3 33.2 32.1 35.0 27.8 S S S S S S
Multiple modes 13.1 11.3 17.1 34.1 27.9 39.6 34.9 35.5 71.6 6.3 7.1 8.6
Parcel, USPS or courier 13.3 11.8 17.9 16.1 15.0 22.6 17.9 21.7 24.6 6.3 7.1 8.6
Truck and rail 23.6 21.5 19.3 11.8 S S 18.5 18.3 13.4 13.5 13.1 22.9
Other multiple modes 29.3 30.9 15.8 39.7 29.0 70.2 41.7 S S 20.4 44.0 157.4
Other and unknown modes 19.8 16.5 25.3 23.8 32.9 12.5 16.0 28.2 12.0 36.7 18.5 27.9

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 27.1 16.8 29.8 31.8 19.3 22.6 S 13.2 S 31.2 28.1 40.3
Single modes 27.3 17.0 31.1 31.8 20.1 23.8 S 14.5 S 24.0 30.9 37.8
Truck 27.3 17.0 31.4 31.8 20.2 23.9 S 14.8 S 24.0 31.0 38.4
Rail S S S S S S 28.0
Water
Air (including truck and air) S S S S S S S S S S 29.6 S
Pipeline S S S S S S
Multiple modes S 31.5 S S 47.7 S S S S 22.0 14.2 42.8
Parcel, USPS or courier S S S S 37.4 S S 41.9 S 22.0 14.5 44.5
Truck and rail 48.5 S S S S 27.0
Other multiple modes
Other and unknown modes S 35.1 S S S S S 36.3 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 13.5 7.6 16.1 16.7 6.7 20.5 13.1 6.1 12.7 30.8 35.8 44.6
Single modes 13.4 7.1 15.4 17.4 6.8 21.2 13.5 5.7 13.1 27.5 14.3 34.6
Truck 13.4 7.3 15.5 17.4 6.9 21.3 13.6 6.0 13.6 28.5 14.3 35.0
Rail S 34.6 S S 36.0 S S 32.9 S 29.8 22.2 64.5
Water
Air (including truck and air) S S S S S S S S S 31.6 44.4 37.0
Pipeline S S S S S S
Multiple modes 33.8 29.1 20.6 30.2 31.6 58.3 32.1 40.9 57.1 22.2 19.2 35.4
Parcel, USPS or courier S 38.8 S S 44.6 S S S S 19.7 21.4 33.1
Truck and rail 31.6 40.9 80.7 30.1 36.4 72.3 32.0 42.3 59.6 20.3 16.8 18.2
Other multiple modes S S S S S S S S S 31.6 31.6 571.7
Other and unknown modes S S S S 48.1 S S 40.9 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 16.3 16.3 15.6 19.3 13.0 16.9 S 22.8 S 10.0 28.9 21.1
Single modes 16.4 15.1 16.0 19.3 13.9 17.8 S 26.0 S 10.1 14.7 15.5
Truck 16.9 15.7 16.5 19.5 14.1 18.0 S 29.0 S 9.8 14.4 15.2
Rail 19.7 37.3 30.1 28.7 32.5 25.5 18.5 21.7 15.9 30.2 S S
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 31.2 55.9
Pipeline S S S S S S
Multiple modes S S S S S S S S S 26.2 S S
Parcel, USPS or courier S S S S S S S S S 27.2 28.7 63.3
Truck and rail S S S S S S S S S 27.9 30.8 76.3
Other multiple modes S S S S S S 31.6
Other and unknown modes S 46.8 S S 47.7 S S S S S 32.4 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 21.3 10.4 15.9 13.8 10.2 11.8 24.1 20.4 44.3 38.4 13.7 168.3
Single modes 21.5 10.7 16.8 14.6 10.1 12.4 29.6 20.4 43.2 44.1 12.0 120.4
Truck 28.6 9.0 19.5 24.7 10.9 12.1 22.1 14.1 15.2 43.2 11.2 108.1
Rail 23.0 18.9 40.4 24.5 22.2 54.1 34.0 31.4 72.4 11.3 9.7 16.9
Water S S S 34.9 S S 38.2 S S 30.5 28.4 35.4
Air (including truck and air) S S S S S S S S S 31.6 30.1 42.4
Pipeline 32.5 35.1 35.4 32.1 34.6 29.4 S S S S S S
Multiple modes 43.0 40.8 35.9 40.1 25.2 86.9 42.4 24.0 207.7 20.2 43.4 156.5
Parcel, USPS or courier S S S S S S S S S 30.5 29.7 121.8
Truck and rail S S S S S S 31.6
Other multiple modes 41.3 39.5 27.9 40.1 25.0 90.8 42.4 23.6 212.3 20.5 S S
Other and unknown modes 44.0 38.2 7.4 S S S S 48.2 S 38.6 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 15.9 8.0 39.1 18.0 17.5 35.5 20.1 18.9 37.4 12.7 8.2 15.1
Single modes 17.6 7.8 49.2 17.8 17.9 36.1 19.8 19.5 38.7 22.0 9.3 34.2
Truck 17.2 8.2 50.5 16.0 16.7 37.4 18.1 8.2 37.6 21.1 8.0 34.3
Rail 42.4 S S S S S 44.2 S S 27.8 S S
Water S S S S S S S S S 31.6 31.6 37.8
Air (including truck and air) S 44.3 S S 27.4 S S 25.9 S 14.5 12.4 28.0
Pipeline 41.7 S S S S S S S S
Multiple modes 21.8 15.7 26.5 33.4 13.8 41.3 22.9 16.8 31.8 16.7 6.2 16.8
Parcel, USPS or courier 22.2 16.1 27.4 45.7 11.9 69.2 47.8 14.8 86.3 16.6 6.2 16.8
Truck and rail 33.2 31.0 22.6 32.4 33.6 30.1 36.0 26.7 35.7 23.0 20.8 41.2
Other multiple modes S S S S S S S S S 31.6 31.6 30.0
Other and unknown modes S 24.2 S 43.1 32.0 50.5 S 37.5 S 42.1 32.6 61.1

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 11.3 27.4 25.9 18.2 6.7 19.1 9.0 16.9 14.7 8.7 12.0 18.4
Single modes 10.9 25.8 23.1 18.9 6.8 20.0 10.7 16.8 15.9 21.0 17.9 11.5
Truck 10.7 26.2 23.1 19.1 6.8 20.4 10.1 17.1 16.1 20.8 19.1 11.8
Rail 44.7 13.6 39.9 34.9 20.1 19.1 43.1 20.8 25.3 S S S
Water S S S S S S 31.6
Air (including truck and air) 47.6 23.1 87.7 41.4 49.5 38.0 37.3 35.7 35.6 13.3 10.3 12.4
Pipeline S S S S S S S S S S
Multiple modes 22.4 39.4 48.8 21.0 32.2 42.1 24.9 44.0 49.2 6.1 13.1 20.3
Parcel, USPS or courier 22.4 39.9 49.6 21.1 36.5 48.2 24.9 S S 6.1 13.1 20.3
Truck and rail S 37.3 S S 34.5 S S 46.4 S 29.9 S S
Other multiple modes 49.9 S S 49.3 25.9
Other and unknown modes 27.6 19.0 53.7 S 38.4 S 34.1 S S 22.0 28.1 15.5

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 4.2 3.1 4.5 16.8 23.6 15.4 7.2 6.9 7.6 13.8 20.0 18.3
Single modes 6.0 3.5 6.2 17.4 24.9 16.5 7.9 6.7 8.2 15.7 6.2 18.0
Truck 6.4 3.4 6.7 18.6 26.2 17.3 9.7 5.9 9.6 14.2 6.7 16.7
Rail 13.9 23.6 16.2 11.0 26.4 20.2 17.9 20.1 15.3 10.8 9.3 10.1
Water S S S S S S S S S 27.9 31.6 S
Air (including truck and air) 34.0 20.8 10.8 S 35.5 S 43.4 42.0 5.3 22.7 7.6 32.7
Pipeline S S S S S S
Multiple modes 27.3 12.9 24.1 33.7 25.2 38.1 30.3 37.5 26.1 8.5 19.1 14.5
Parcel, USPS or courier 28.5 12.1 24.9 43.1 16.3 56.2 47.5 34.0 66.4 8.6 19.1 14.5
Truck and rail 42.0 S S 47.3 S S 41.2 S S 21.8 18.5 21.1
Other multiple modes S S S S S S S S S 27.8 35.6 81.9
Other and unknown modes 24.0 26.9 18.7 45.4 S S 40.7 16.9 12.7 S 12.4 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 8.5 11.6 17.2 19.7 12.3 29.7 14.0 21.4 19.9 14.5 16.0 13.4
Single modes 11.8 14.1 20.1 20.0 10.9 30.7 14.9 21.2 21.5 42.2 15.9 38.1
Truck 12.4 10.5 21.7 20.3 10.6 35.0 15.8 21.4 27.3 43.4 16.1 49.2
Rail 46.6 35.9 8.6 40.9 33.3 6.7 42.5 29.8 6.7 28.6 15.7 24.2
Water S S S S S S 31.6
Air (including truck and air) 44.6 S S 48.6 31.6 22.0 28.2 45.6 11.5 6.1 2.9 7.5
Pipeline S S S S S S
Multiple modes 21.2 9.3 36.3 15.5 24.2 23.6 26.4 33.7 23.7 13.0 11.2 10.1
Parcel, USPS or courier 21.2 9.1 36.6 15.6 12.7 24.6 27.2 14.9 35.9 13.0 11.2 10.1
Truck and rail 43.9 S S S S 22.8
Other multiple modes S S S S S S S S S 27.9 S S
Other and unknown modes 34.3 25.2 46.8 43.9 26.3 42.6 27.6 41.9 15.6 S 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 4.0 4.8 10.7 22.1 S S S 36.9 S 19.5 11.5 6.9
Single modes 4.3 5.2 15.6 23.1 S S S 15.1 S 36.8 18.6 14.3
Truck 3.9 5.3 15.6 12.8 S S 18.9 10.8 42.1 37.1 19.1 15.1
Rail S 32.7 S 46.4 40.3 5.7 S 49.7 S 28.2 S S
Water S S S S S S 31.6
Air (including truck and air) 42.7 24.9 14.3 41.0 22.1 10.9 S 20.3 S 19.0 7.4 29.4
Pipeline S S S S S S
Multiple modes 14.9 18.1 11.4 26.9 S S 21.7 S S 19.0 9.5 10.5
Parcel, USPS or courier 15.1 18.8 11.8 26.2 20.7 22.8 16.6 28.2 10.0 19.0 9.5 10.4
Truck and rail S 48.4 S S S S S 38.2 S 31.6 40.8 40.9
Other multiple modes S S S S S S S S S 31.6 30.8 244.0
Other and unknown modes 49.3 20.1 49.9 S 43.5 S S 36.4 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 40.5 16.8 51.5 46.3 46.5 185.8 S 36.5 S 19.6 15.2 20.6
Single modes 44.9 24.0 78.2 41.2 48.4 139.1 S 41.6 S 30.8 24.7 24.7
Truck 47.7 24.4 82.3 49.8 49.4 119.7 S 33.4 S S 26.9 S
Rail 46.5 S S S S S S S S 26.9 30.9 7.4
Water
Air (including truck and air) S 39.9 S S 44.1 S S 43.7 S 29.3 24.0 50.0
Pipeline S S S S S S
Multiple modes 49.2 33.4 27.7 S S S S S S 26.7 14.6 38.0
Parcel, USPS or courier 49.2 33.9 28.1 S S S S S S 26.7 14.8 38.1
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S S S S 41.7 S S S S 29.9 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.