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 5.4 3.5 7.8 7.8 8.5 10.4 9.4 3.4 9.9 7.7 13.0 15.2
Single modes 7.1 4.7 10.4 7.8 9.0 10.8 8.7 3.9 9.3 18.3 12.3 43.3
Truck 7.7 4.3 11.8 8.3 10.1 11.6 10.3 6.4 13.4 7.8 12.6 18.5
Rail 18.4 14.2 10.7 20.5 10.6 16.9 16.3 8.4 13.8 8.2 4.4 11.0
Water 40.8 28.9 58.2 29.1 20.3 33.1 28.5 20.7 28.5 28.4 12.6 18.4
Air (including truck and air) 28.7 19.4 37.6 32.6 33.5 17.7 31.0 28.8 21.9 5.0 3.7 7.2
Pipeline 44.2 43.7 166.9 S 44.0 S S S S S S S
Multiple modes 11.6 9.1 21.6 29.9 20.0 32.6 31.7 14.4 40.8 5.4 6.9 7.7
Parcel, USPS or courier 7.9 5.8 14.4 17.1 7.3 24.8 17.5 12.0 30.4 5.4 7.4 8.1
Truck and rail 26.7 20.5 48.2 22.3 13.9 29.3 22.5 13.5 25.9 7.6 6.6 8.5
Other multiple modes 23.9 32.8 94.5 35.5 24.1 36.7 39.5 22.0 56.0 44.0 43.0 59.9
Other and unknown modes 37.9 26.5 32.5 40.8 45.5 42.7 31.3 28.0 19.7 41.2 28.4 71.4

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 23.9 10.3 18.2 41.8 11.4 39.9 S 15.4 S 31.7 24.1 15.1
Single modes 22.1 9.3 15.6 41.8 11.9 41.2 S 15.5 S 24.2 19.6 46.4
Truck 21.7 8.9 15.7 42.5 11.6 48.8 49.7 15.6 50.9 23.4 19.0 45.3
Rail S 31.3 S S 27.1 S S 27.3 S 26.8 17.3 60.4
Water S S S S S S 31.6
Air (including truck and air) S S S S S S S S S 31.6 28.0 15.4
Pipeline S S S S S S
Multiple modes S 40.1 S S S S S S S 24.2 18.7 30.1
Parcel, USPS or courier S S S S S S S S S 25.8 19.3 31.8
Truck and rail S S S S S S 28.6
Other multiple modes S S S S S S S S S 31.6 31.6 4.8
Other and unknown modes S 40.8 S S 36.8 S S S S 31.6 21.7 117.3

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 11.9 4.8 13.5 39.1 5.0 64.5 20.9 13.5 31.5 19.6 9.8 75.4
Single modes 12.4 4.9 13.5 39.4 5.0 65.6 21.3 13.0 32.1 36.8 10.5 46.0
Truck 12.7 5.1 13.8 39.8 5.4 66.8 21.6 13.5 33.8 35.7 10.5 44.8
Rail 42.7 34.5 71.0 40.2 43.3 49.2 41.2 29.1 42.4 23.9 22.1 31.6
Water
Air (including truck and air) S S S S S S 26.1
Pipeline S S S S S S S S S S
Multiple modes S 35.8 S 49.9 40.7 70.7 35.3 36.4 47.5 35.3 S S
Parcel, USPS or courier S S S S S S 44.6 S S 16.5 47.2 124.6
Truck and rail S 39.6 S S 42.6 S 43.6 36.6 41.5 24.2 16.7 26.8
Other multiple modes S S S S S S 31.6
Other and unknown modes S 40.6 S 43.4 44.7 33.2 S S 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 30.9 9.0 52.0 16.3 12.2 16.8 26.0 13.4 30.7 32.1 13.6 48.1
Single modes 37.7 13.6 60.4 18.0 13.5 19.0 20.0 15.2 23.3 32.8 9.4 47.7
Truck 44.8 15.5 97.5 24.5 17.3 25.5 33.7 15.6 50.4 34.5 8.3 53.4
Rail 30.8 28.4 31.3 28.5 31.4 31.4 34.8 15.4 43.2 16.9 21.0 19.2
Water 27.5 33.1 23.9 28.5 22.1 31.6 28.8 21.8 28.0 10.9 15.6 16.1
Air (including truck and air)
Pipeline S S S S S S
Multiple modes 38.5 42.5 180.4 38.9 25.5 39.2 43.8 26.7 66.8 20.4 S S
Parcel, USPS or courier S S S S S S S 45.5 S 31.6 S S
Truck and rail S S S S S S S S S 30.1 31.6 S
Other multiple modes 37.1 43.0 119.8 38.3 25.5 38.2 42.9 26.7 64.6 15.4 16.2 44.0
Other and unknown modes 41.4 S S S S S 45.0 S S 47.5 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 14.8 39.2 42.9 18.6 26.9 33.4 47.3 27.2 64.3 18.9 17.2 18.3
Single modes 14.8 39.4 43.0 18.9 27.1 33.4 S 27.2 S 19.8 16.6 17.7
Truck 17.4 44.2 41.2 20.3 30.4 29.3 39.2 29.3 37.6 15.4 17.5 16.1
Rail S 36.9 S S 44.8 S S 42.8 S 27.8 21.6 33.3
Water S S S S S S S S S 30.4 29.2 77.1
Air (including truck and air) S S S S S S 30.1
Pipeline 44.2 44.7 171.5 S 46.0 S S S S S S S
Multiple modes S S S S S S S 41.8 S 47.1 26.2 20.0
Parcel, USPS or courier S S S S S S S 41.8 S 47.4 26.2 20.0
Truck and rail
Other multiple modes S S S S S S 31.6
Other and unknown modes 45.1 S S S S S S S S 29.3 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 18.5 5.2 30.7 23.9 10.7 27.8 32.8 12.5 45.2 8.0 13.9 37.3
Single modes 22.3 5.9 36.1 24.5 10.9 29.4 33.3 10.6 50.9 11.8 19.2 63.7
Truck 22.9 6.8 37.0 24.7 10.9 29.6 32.9 12.2 49.7 12.1 15.9 60.2
Rail 39.2 31.1 69.9 37.0 39.4 62.2 42.3 24.6 89.1 15.9 21.7 39.7
Water S S S S S S 31.6
Air (including truck and air) S 46.3 S S 37.3 S S 22.3 S 11.7 7.3 17.2
Pipeline S S S S S S S S S S
Multiple modes 29.1 14.1 59.7 21.3 21.2 18.4 35.7 31.7 23.8 12.0 11.6 23.7
Parcel, USPS or courier 30.2 15.0 96.7 28.3 22.6 54.3 29.0 25.3 78.7 12.2 11.8 24.2
Truck and rail 48.5 43.1 7.5 S 32.6 S S 35.7 S 18.3 10.4 23.8
Other multiple modes S S S S S S S S S 29.8 29.8 21.2
Other and unknown modes 31.7 19.5 64.3 37.1 34.8 22.0 39.6 S S 40.3 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 25.7 6.4 30.5 10.1 5.4 9.9 11.3 8.3 14.7 6.6 15.1 20.5
Single modes 16.2 5.3 15.7 10.5 5.8 10.2 9.7 7.8 13.0 24.0 18.3 33.4
Truck 17.0 5.1 16.5 12.4 5.5 11.3 14.3 5.9 17.0 28.4 19.1 33.8
Rail 13.6 25.3 22.7 12.1 21.9 24.4 10.4 21.4 21.1 7.6 5.8 9.0
Water
Air (including truck and air) 39.2 S S 32.2 45.8 133.5 37.7 S S 10.8 11.9 17.4
Pipeline S S S S S S S S S S S S
Multiple modes 23.7 26.8 40.0 36.3 23.8 71.1 47.5 38.5 51.4 6.2 10.6 12.6
Parcel, USPS or courier 25.1 29.0 42.4 35.3 24.5 51.3 34.7 41.9 56.0 6.2 10.6 12.7
Truck and rail 48.0 S S S S S S S S 38.9 21.5 22.0
Other multiple modes S S S S S S S S S 31.6 30.7
Other and unknown modes S 33.3 S S 34.3 S S S S S 45.9 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 8.1 7.2 11.7 7.5 21.0 13.5 15.0 10.9 13.8 17.0 8.0 22.2
Single modes 7.6 7.2 10.9 9.1 21.4 13.5 15.6 11.0 14.0 17.9 12.6 22.5
Truck 7.7 7.5 11.1 9.8 22.5 13.4 9.2 14.0 11.5 10.2 13.4 14.4
Rail 21.7 31.7 53.5 S 23.1 S S 19.3 S 13.1 21.4 39.6
Water S S S S S S S S S 28.1 26.1 26.2
Air (including truck and air) 39.9 19.6 64.2 37.1 S S 34.4 S S 9.0 7.1 15.1
Pipeline S S S S S S
Multiple modes 13.7 6.3 20.2 31.7 39.5 44.4 37.2 33.2 50.9 12.4 5.1 16.9
Parcel, USPS or courier 16.7 6.4 22.7 13.6 11.9 21.8 31.2 14.1 54.8 12.4 5.1 17.0
Truck and rail S 37.5 S S 48.9 S S 38.5 S 41.6 25.0 34.7
Other multiple modes S S S S S S S S S 29.3 32.0 26.4
Other and unknown modes 49.0 21.5 81.9 S 17.5 S S 29.7 S S 19.7 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 9.1 4.9 12.9 11.2 11.4 14.8 15.5 10.6 18.5 15.8 15.1 39.0
Single modes 11.6 6.8 17.6 12.0 12.9 16.6 18.1 15.6 23.6 21.7 26.6 124.7
Truck 13.4 6.4 26.5 12.8 10.3 18.5 22.5 7.7 39.0 18.6 29.0 53.2
Rail 26.4 16.4 11.3 11.7 30.8 14.9 13.8 23.7 13.2 10.9 7.0 15.2
Water S S S S S S 31.6
Air (including truck and air) 30.7 19.7 28.8 36.7 39.1 24.0 33.1 37.7 34.3 4.6 3.5 6.2
Pipeline S S S S S S
Multiple modes 24.5 18.3 49.8 26.0 19.1 43.3 28.5 16.1 46.5 12.2 6.0 10.9
Parcel, USPS or courier 21.4 6.9 38.0 30.3 11.6 49.8 19.6 15.1 34.9 12.3 6.3 11.5
Truck and rail 29.8 25.6 62.7 28.5 21.0 46.8 29.5 17.0 48.4 13.4 8.4 13.2
Other multiple modes S S S S S S S S S 32.8 43.2 103.4
Other and unknown modes 29.4 41.6 8.6 34.3 33.0 12.9 25.6 S S S 40.7 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 17.5 8.5 28.6 27.5 10.2 44.1 20.0 8.4 26.0 15.7 8.7 19.5
Single modes 16.0 10.0 31.2 26.5 10.4 44.1 21.4 9.4 28.9 24.9 13.2 25.7
Truck 16.0 10.6 32.6 25.4 12.9 47.8 23.3 11.9 40.8 25.3 14.9 27.7
Rail S 31.0 S S 19.8 S S 21.0 S 43.6 9.3 31.6
Water S S S S S S 31.6
Air (including truck and air) 46.7 S S 31.7 S S 36.5 S S 12.5 7.6 15.6
Pipeline S S S S S S
Multiple modes 22.1 9.8 13.2 22.0 26.9 20.5 28.0 31.1 35.4 11.7 7.1 16.7
Parcel, USPS or courier 23.5 10.7 14.8 22.6 8.8 15.4 23.5 9.7 18.5 11.8 7.1 16.8
Truck and rail 24.0 32.0 11.4 33.6 41.5 30.3 33.8 38.5 44.7 19.2 15.2 29.8
Other multiple modes S S S S S S S S S 31.6 S S
Other and unknown modes S 41.8 S S 38.5 S S 35.5 S 25.3 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 29.8 24.8 54.4 38.8 36.9 32.4 39.0 S S 42.2 23.2 33.0
Single modes 32.4 25.2 39.6 40.6 41.2 35.6 31.3 S S 35.2 28.6 15.2
Truck 36.2 25.5 41.5 43.6 35.5 39.8 36.5 48.9 52.4 32.0 28.8 14.0
Rail S S S S S S S S S 31.6 31.6 50.5
Water
Air (including truck and air) S S S S S S S S S 31.6 31.6 133.9
Pipeline S S S S S S
Multiple modes S 42.4 S S S S S S S 34.4 41.1 107.0
Parcel, USPS or courier S S S S 40.1 S S 40.1 S 40.8 41.8 78.9
Truck and rail S S S S S S S S S 29.9 29.9 380.1
Other multiple modes
Other and unknown modes S 44.5 S S S S S S S 31.5 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.