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 6.1 3.7 7.9 21.7 9.1 28.5 8.0 12.0 18.4 11.9 7.2 12.2
Single modes 7.8 3.6 9.9 24.6 8.0 30.8 9.1 11.4 18.1 26.8 10.2 24.3
Truck 8.9 4.5 11.5 35.7 9.9 47.3 22.1 12.0 33.3 31.8 8.5 37.7
Rail 20.4 15.8 19.7 9.4 18.2 16.4 19.6 20.4 20.4 8.4 5.7 11.9
Water 19.6 26.9 49.7 16.8 20.9 64.1 18.9 26.7 82.6 25.1 13.5 16.9
Air (including truck and air) 22.2 10.9 47.1 16.4 17.0 12.8 15.4 20.4 12.6 3.6 3.4 5.2
Pipeline S 34.2 S S 36.7 S S S S S S S
Multiple modes 8.1 7.1 10.5 14.7 25.7 43.4 16.5 26.0 48.8 5.6 5.7 7.9
Parcel, USPS or courier 9.0 6.6 11.9 18.9 14.3 18.1 14.3 18.1 14.7 5.6 5.6 7.8
Truck and rail S 41.0 S S 26.2 S S 25.3 S 24.7 9.3 22.5
Other multiple modes 20.0 24.4 44.8 15.3 27.3 46.5 17.2 28.0 54.7 18.5 S S
Other and unknown modes 29.2 11.6 24.5 25.1 38.3 37.9 32.7 46.9 24.8 38.3 31.0 15.6

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 18.0 6.0 18.6 17.4 8.6 18.3 18.2 16.1 33.7 S 14.2 S
Single modes 18.7 6.6 19.3 17.8 9.1 18.9 17.9 17.0 36.0 S 13.5 S
Truck 18.5 5.9 19.5 23.8 9.9 20.5 20.0 8.5 28.0 S 14.3 S
Rail 32.3 10.7 19.4 25.9 12.0 16.2 28.8 15.0 21.0 12.1 16.3 43.1
Water 20.9 36.2 63.5 21.3 31.9 83.2 21.8 35.9 102.1 10.6 11.2 17.5
Air (including truck and air) S S S S S S 29.8
Pipeline S S S S S S
Multiple modes S 45.9 S S S S S S S 21.9 19.5 66.9
Parcel, USPS or courier S 43.3 S S 29.8 S S 23.4 S 25.7 14.4 68.8
Truck and rail S S S S S S S S S 30.5 28.9 53.2
Other multiple modes S S S S S S S S S 31.6 31.0 26.2
Other and unknown modes S 39.9 S 49.1 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 32.1 7.7 43.8 42.6 7.3 60.3 S 10.9 S 39.7 26.4 34.0
Single modes 32.3 8.2 45.8 42.8 7.7 62.1 S 10.9 S 39.8 12.1 42.6
Truck 33.3 8.3 47.0 29.9 6.7 36.9 37.8 9.0 66.5 43.4 12.0 43.4
Rail S 19.3 S S 21.0 S S 19.5 S 11.7 5.1 14.0
Water S S S S S S S S S 31.6 29.8 43.4
Air (including truck and air) S S S S S S 29.2
Pipeline S S S S S S
Multiple modes S 42.0 S S 39.7 S S 36.0 S 32.2 39.7 21.8
Parcel, USPS or courier S S S S S S S S S 32.2 22.7 16.9
Truck and rail 36.3 42.2 37.9 21.2
Other multiple modes S S S S S S S S
Other and unknown modes 35.5 S S 42.0 S S S 43.7 S 29.6 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 16.1 15.4 22.2 9.2 20.7 23.6 10.9 24.9 33.5 38.3 31.7 162.8
Single modes 23.8 19.4 25.5 12.6 22.1 22.1 17.3 38.1 29.4 15.1 32.7 29.6
Truck 40.8 28.1 37.6 28.7 36.6 31.4 32.7 23.8 23.3 15.3 27.5 26.2
Rail 18.8 45.3 48.1 11.9 40.0 45.7 21.9 46.5 38.0 13.2 S S
Water 49.2 S S 41.9 S S S S S S 28.1 S
Air (including truck and air) S S S S S S S S S 31.6 31.6 138.4
Pipeline 21.0 21.1 S S S S S S
Multiple modes 17.4 27.5 43.4 15.4 28.0 48.1 17.6 28.4 55.3 16.1 S S
Parcel, USPS or courier S S S S S S S S S 29.2 S S
Truck and rail S S S S S S 31.6
Other multiple modes 17.4 27.4 43.0 15.4 28.0 48.1 17.6 28.4 55.3 5.6 18.3 19.8
Other and unknown modes S S S S S S S S S 43.3 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 33.9 31.9 37.0 31.4 33.3 27.3 37.6 S S 43.6 30.5 31.5
Single modes 34.2 32.6 38.1 33.4 33.9 26.5 38.0 S S 42.5 27.0 33.5
Truck 32.7 28.5 48.9 29.7 23.5 27.6 S 36.1 S 24.8 22.4 27.0
Rail S S S S S S S S S 27.9 29.4 53.8
Water 42.3 S S 41.6 S S 41.7 S S 25.8 45.5 209.5
Air (including truck and air) S S S S S S 31.6
Pipeline S 34.6 S S 37.2 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 44.5 S S 41.2 S S S S S 32.1 S
Truck and rail
Other multiple modes S S S S S S S S S 26.1 37.5 S
Other and unknown modes S S S S S S S S S 30.4 20.7 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 16.0 6.0 24.8 17.6 25.1 11.0 25.8 49.3 17.0 21.2 12.1 20.6
Single modes 24.9 6.8 36.6 17.4 26.3 11.3 26.5 S S 32.4 13.7 50.7
Truck 25.0 6.7 38.3 17.4 11.9 11.0 26.6 13.8 27.5 32.5 15.8 59.8
Rail 42.3 S S S S 21.4
Water S S S S S S 31.6
Air (including truck and air) 35.7 37.9 4.1 34.5 S S 40.1 S S 5.3 7.4 10.8
Pipeline S S S S S S S S S S
Multiple modes 33.5 16.2 65.2 28.6 12.8 18.2 39.5 20.3 18.9 14.9 10.4 14.9
Parcel, USPS or courier 33.5 16.3 65.5 28.6 15.3 20.1 39.6 23.1 22.8 14.9 10.4 14.9
Truck and rail S S S S S S 28.2
Other multiple modes S S S S S S S S S 31.6 31.6 86.4
Other and unknown modes 31.9 42.4 22.7 S 35.3 S 43.2 29.1 17.4 S 29.6 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 7.6 7.9 9.5 6.2 8.9 9.9 6.2 14.8 14.5 9.9 12.6 20.3
Single modes 9.2 9.6 11.3 6.6 9.7 10.9 6.7 8.0 11.1 21.4 20.7 64.5
Truck 10.3 10.7 12.3 8.8 11.2 11.9 9.0 7.3 10.4 21.5 14.1 113.0
Rail 8.6 16.6 22.0 7.7 11.2 20.8 8.9 13.7 21.5 6.7 5.2 7.0
Water
Air (including truck and air) S 23.0 S S S S S S S 12.4 4.5 15.4
Pipeline S S S S S S
Multiple modes 10.2 11.8 13.6 31.7 26.0 29.1 19.7 30.8 14.3 6.3 10.4 14.5
Parcel, USPS or courier 10.2 11.9 14.3 32.9 21.8 45.4 19.4 29.7 27.2 6.3 10.4 14.5
Truck and rail 47.0 41.6 4.2 S 49.1 S S 47.7 S 26.9 16.5 30.4
Other multiple modes S S S S S S S S S 31.6 31.6 42.3
Other and unknown modes 44.5 24.2 51.5 S S S S S S 27.2 43.9 81.1

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 12.3 6.2 17.3 S 13.8 S 44.4 32.8 117.3 24.7 9.3 15.2
Single modes 15.5 6.6 22.3 S 15.2 S 43.6 35.3 159.3 41.8 12.6 27.2
Truck 16.0 7.0 23.3 S 16.0 S S 13.9 S 39.1 12.6 24.9
Rail 37.1 47.0 38.0 43.7 S S 47.0 S S 19.8 30.1 102.3
Water 43.0 41.5 41.6 25.8
Air (including truck and air) 25.8 29.6 28.9 S 34.8 S S 37.2 S 12.2 5.7 15.3
Pipeline S S S S S S
Multiple modes 14.8 14.9 18.3 36.6 28.7 33.6 S 36.4 S 14.9 10.4 14.8
Parcel, USPS or courier 15.2 14.6 19.4 20.2 21.9 13.8 18.6 28.1 14.9 14.9 10.4 14.8
Truck and rail S 48.5 S S S S S S S 28.1 15.2 30.1
Other multiple modes S S S S S S S S S 29.6 31.6 41.8
Other and unknown modes 37.6 23.3 63.5 S S S S S S S 23.8 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 8.4 11.8 11.8 12.9 12.2 10.4 10.2 23.2 13.1 5.5 5.8 9.0
Single modes 10.8 15.1 15.9 11.0 10.4 7.9 16.3 21.2 17.7 20.0 15.6 24.0
Truck 10.8 16.5 13.1 11.7 10.4 8.1 17.8 22.0 18.5 26.6 21.4 40.1
Rail S S S S S S S S S 31.6 S S
Water
Air (including truck and air) 24.7 13.0 69.2 22.4 13.4 29.8 24.2 13.9 29.7 2.5 4.4 5.0
Pipeline S S S S S S S S S S
Multiple modes 14.3 12.3 14.3 28.5 27.2 16.9 23.0 33.4 14.3 4.9 2.9 6.1
Parcel, USPS or courier 14.6 9.3 15.8 27.5 17.3 28.6 22.2 20.7 29.0 5.0 2.9 6.1
Truck and rail S S S S S S S S S 31.6 26.2 46.6
Other multiple modes S S S S S S 31.6
Other and unknown modes S 34.9 S S 32.5 S 34.7 S S S 19.8 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 10.8 4.4 19.1 24.7 31.0 28.2 41.4 44.9 35.2 9.9 6.4 7.7
Single modes 12.3 6.2 24.9 25.4 32.0 29.1 42.3 48.4 37.1 17.1 19.9 17.2
Truck 11.9 6.2 24.7 20.6 33.1 23.2 20.5 S S 17.3 20.6 20.9
Rail S 42.1 S S S S S S S 27.0 17.0 14.9
Water S S S S S S 29.8
Air (including truck and air) 21.9 26.1 36.0 43.0 36.1 64.0 35.4 37.7 53.3 8.3 6.0 9.8
Pipeline S S S S S S
Multiple modes 16.4 8.3 24.3 21.0 17.3 18.7 33.3 20.2 26.6 9.4 5.4 7.9
Parcel, USPS or courier 17.6 7.9 24.9 22.8 17.3 19.3 17.8 20.2 12.1 9.4 5.5 7.8
Truck and rail S S S S S S 24.6
Other multiple modes S S S S S S S S S 30.3 29.1 38.2
Other and unknown modes 41.2 25.4 45.6 47.3 26.5 29.4 S 40.8 S S 26.0 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 30.2 25.2 10.4 S 28.7 S S 40.0 S 24.5 30.4 81.6
Single modes 31.9 25.5 11.3 S 29.4 S S 40.7 S 27.2 S S
Truck 31.9 25.5 7.4 S 30.5 S S 43.9 S 27.5 S S
Rail S S S S S S 29.8
Water S S S S S S 31.6
Air (including truck and air) S S S S S S S S S 30.6 28.8 41.6
Pipeline S S S S S S
Multiple modes 48.1 41.2 7.2 S 47.0 S S S S 23.5 20.1 46.7
Parcel, USPS or courier 50.0 41.3 6.7 S 47.3 S S S S 23.5 20.0 46.8
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 S S S S S S S S 45.3 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.