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 13.8 5.4 20.2 10.3 6.5 13.8 6.4 6.4 10.3 14.3 8.1 15.3
Single modes 15.3 5.8 23.0 10.6 6.5 13.7 6.5 6.9 10.4 10.4 9.9 11.6
Truck 18.6 5.6 27.4 14.2 9.8 16.9 11.0 9.2 15.0 10.3 5.4 10.7
Rail 34.9 31.3 80.5 13.3 17.9 42.6 15.2 14.8 27.3 11.7 8.0 10.8
Water 36.7 30.7 27.8 31.4 29.5 25.1 33.5 28.5 25.6 18.4 15.4 21.9
Air (including truck and air) 21.9 27.5 12.8 S 44.7 S S 41.0 S 4.0 2.5 5.6
Pipeline 25.3 28.0 67.5 22.7 36.2 79.4 S S S S S S
Multiple modes 13.2 8.0 18.3 29.7 34.1 186.8 29.9 25.6 124.0 6.9 4.5 7.7
Parcel, USPS or courier 14.5 9.3 20.3 19.6 7.3 22.2 22.5 9.5 21.3 6.9 4.5 7.7
Truck and rail 25.6 33.5 46.8 32.9 S S 34.1 49.1 336.4 19.6 26.9 27.1
Other multiple modes S S S 42.9 S S 46.9 S S S S S
Other and unknown modes 19.8 16.3 18.2 42.3 28.3 109.7 47.0 36.4 77.1 S 24.6 S

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 14.0 11.0 22.6 34.3 13.7 38.3 13.4 20.0 14.3 S 16.3 S
Single modes 14.1 10.5 23.4 34.3 15.2 40.8 13.4 20.4 14.6 48.9 18.3 68.6
Truck 15.4 12.3 27.0 39.5 20.4 56.3 15.9 29.3 29.0 S 18.4 S
Rail S S S S S S 31.6
Water 33.1 30.7 15.8 32.6 29.5 17.6 32.9 28.5 16.8 21.1 15.4 25.2
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S S 27.9 S
Parcel, USPS or courier S S S S S S S S S S 29.3 S
Truck and rail S S S S S S 28.7
Other multiple modes
Other and unknown modes S S S S S S S S S 29.3 28.4 69.0

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 21.1 14.2 33.7 43.5 14.7 86.7 35.1 15.3 64.0 18.3 47.9 67.9
Single modes 22.1 14.7 34.3 44.0 15.0 88.7 35.2 14.9 63.7 42.7 40.1 54.6
Truck 22.1 14.9 34.8 43.8 15.2 94.6 35.3 17.3 80.0 41.5 40.5 54.0
Rail S S S S 49.8 S S S S 29.8 26.0 34.8
Water
Air (including truck and air) 50.0 S S 49.7 S S 46.6 S S 24.5 31.6 35.3
Pipeline S S S S S S
Multiple modes S 44.0 S 37.0 S S 40.2 S S 32.9 19.1 33.8
Parcel, USPS or courier S 36.3 S S 30.7 S S 40.5 S 29.3 20.4 31.7
Truck and rail 47.1 S S 44.0 S S 42.5 S S 26.0 29.8 33.5
Other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S S S S 31.2 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 17.5 16.9 28.0 14.4 19.6 21.8 10.6 22.9 27.7 26.4 25.7 44.5
Single modes 17.7 16.7 26.8 14.5 19.5 20.6 10.9 23.0 27.7 25.9 26.2 45.1
Truck 19.3 19.3 28.7 13.9 21.7 17.4 20.0 20.4 24.1 28.0 21.8 44.3
Rail 18.0 S S 25.4 S S 21.9 42.5 67.5 39.9 23.6 23.1
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S 31.9 31.6 632.9
Parcel, USPS or courier S S S S S S 31.6
Truck and rail S S S S S S 31.9
Other multiple modes
Other and unknown modes S S S S S S S S S 28.1 27.6 15.9

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 22.3 14.6 32.1 14.6 15.2 26.3 17.1 27.2 38.3 34.1 28.3 42.2
Single modes 20.4 15.7 30.4 13.5 16.3 26.0 16.3 27.1 37.0 29.7 27.9 37.9
Truck 37.5 21.0 36.1 22.2 23.8 29.6 15.4 35.5 18.7 27.7 29.2 30.1
Rail 32.2 35.2 216.2 27.6 38.0 132.4 24.3 40.2 109.2 8.4 22.1 20.8
Water
Air (including truck and air) S S S S S S 31.6
Pipeline 25.8 28.0 67.4 23.6 36.2 79.3 S S S S S S
Multiple modes S S S S S S S S S 42.4 22.4 11.6
Parcel, USPS or courier S S S S S S S S S 37.4 23.2 8.0
Truck and rail S S S S S S S S S 29.9 31.6 32.7
Other multiple modes S S S S S S S S S 31.6 31.6 1.3
Other and unknown modes S S S S S S S S S 29.8 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 16.7 9.9 29.0 28.7 24.4 47.1 19.5 17.8 32.2 35.8 11.7 27.4
Single modes 19.6 9.6 31.9 30.1 25.8 49.2 19.2 18.5 31.8 40.6 13.2 42.7
Truck 21.0 10.7 35.6 45.4 31.7 70.5 25.1 19.6 43.5 45.6 13.7 45.6
Rail 22.8 18.4 28.0 25.6 26.3 37.8 27.0 25.4 33.9 18.5 8.5 19.0
Water S S S S S S 31.6
Air (including truck and air) S S S S 46.2 S S 36.9 S 16.4 10.2 27.2
Pipeline S S S S S S S S S S
Multiple modes 42.0 19.9 102.1 S 33.7 S S 42.4 S 15.3 9.0 22.6
Parcel, USPS or courier 43.4 22.9 114.0 27.2 31.2 22.8 21.8 35.8 9.7 15.5 8.9 22.9
Truck and rail S S S S S S S S S 30.4 31.6 42.6
Other multiple modes
Other and unknown modes 35.2 22.4 44.6 S 31.1 S S 31.8 S S 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 11.4 12.1 16.5 14.9 13.0 16.3 27.4 14.3 24.3 18.5 10.7 19.0
Single modes 11.9 10.0 17.4 15.5 14.4 17.8 28.8 16.9 27.9 22.6 12.4 37.6
Truck 10.0 8.2 14.4 12.5 12.1 13.9 26.5 13.2 24.4 21.2 9.9 27.8
Rail 43.6 35.6 69.5 42.2 36.2 56.1 43.4 32.9 46.9 20.8 10.4 21.2
Water
Air (including truck and air) S S S S S S S S S 16.6 6.8 19.2
Pipeline S S S S S S S S S S
Multiple modes 27.4 26.5 18.4 S 15.0 S S 21.2 S 9.7 8.2 11.5
Parcel, USPS or courier 27.3 29.1 19.3 45.3 24.3 28.6 36.7 31.1 16.2 9.7 8.3 11.5
Truck and rail S S S S 46.1 S S 46.6 S 31.6 23.6 43.8
Other multiple modes
Other and unknown modes 43.7 25.3 41.8 44.4 S S S S S S 45.1 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 11.7 5.6 14.5 44.5 12.7 69.6 23.9 16.2 34.5 17.5 13.9 21.2
Single modes 9.8 5.8 12.1 48.9 13.2 71.4 25.4 17.6 30.4 20.7 15.5 17.2
Truck 9.9 6.1 12.4 49.6 14.4 75.4 25.9 18.8 33.8 21.8 7.4 18.4
Rail 36.9 27.2 24.4 38.7 26.0 18.2 39.4 29.3 20.8 23.9 17.7 26.2
Water
Air (including truck and air) 20.5 29.2 29.3 S S S S S S 9.4 7.1 12.7
Pipeline S S S S S S S S S S
Multiple modes 31.1 27.8 85.8 40.0 20.0 S 40.6 22.4 S 9.2 8.7 12.1
Parcel, USPS or courier 34.2 27.9 85.4 39.5 20.4 99.2 39.8 24.9 93.5 9.2 8.7 12.0
Truck and rail S S 43.8 46.3 26.6
Other multiple modes S S S S S S 48.7 S S 27.7 31.6 24.0
Other and unknown modes 35.8 13.8 39.0 S 37.8 S S S S S S 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 39.0 20.6 75.2 34.6 16.9 98.4 S 25.8 S 22.0 13.3 25.7
Single modes 42.7 24.6 92.2 35.2 18.4 108.7 S 27.8 S 31.8 17.0 31.8
Truck S 28.2 S 34.7 18.3 97.8 34.7 14.5 99.3 27.2 20.5 45.1
Rail S 44.9 S S 34.6 S S 44.7 S 20.1 20.5 30.8
Water
Air (including truck and air) 39.4 36.8 14.1 S S S S S S 6.1 3.3 8.6
Pipeline S S S S S S S S S S
Multiple modes 19.9 11.5 22.3 30.4 20.6 24.5 18.9 27.7 17.1 12.6 11.4 16.7
Parcel, USPS or courier 20.0 11.5 22.0 31.4 20.6 24.6 21.0 27.7 16.5 12.6 11.4 16.7
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes 39.5 35.3 22.0 S 26.4 S 45.6 S S S 21.5 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 13.5 9.8 26.1 43.6 17.2 62.8 19.3 12.5 27.7 18.5 8.9 17.0
Single modes 14.4 10.3 31.0 43.9 15.3 67.1 19.6 11.1 31.2 49.4 20.2 20.0
Truck 13.7 10.4 30.3 20.2 12.3 29.2 18.6 12.4 33.3 49.5 21.7 20.1
Rail S 33.7 S S 37.8 S S 26.9 S S S S
Water S S S S S S 31.6
Air (including truck and air) S 27.3 S S 26.5 S S 27.7 S 24.8 14.2 29.8
Pipeline S S S S S S S S S S
Multiple modes 26.9 17.4 28.2 33.9 S S 42.3 45.7 12.0 12.0 11.5 16.6
Parcel, USPS or courier 27.0 16.8 29.6 34.6 20.4 46.3 42.3 19.1 53.0 12.0 11.5 16.6
Truck and rail S S S S S S 34.4
Other multiple modes S S S S S S S S S 31.6 31.6 0.3
Other and unknown modes 31.3 35.8 8.0 30.8 46.6 2.6 S 42.5 S S 14.3 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 26.8 37.1 12.7 44.3 S S S S S 23.9 20.7 19.3
Single modes 36.2 33.9 15.9 44.5 S S S S S S 36.0 S
Truck 36.3 40.0 20.7 S 49.5 S S S S 46.7 36.1 27.1
Rail S S S S S S S S S 30.1 29.2 41.6
Water
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 25.1 19.0 23.0
Parcel, USPS or courier S S S S S S S S S 25.1 19.0 23.0
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.