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 6.5 5.2 14.7 11.0 6.4 16.6 15.7 4.5 22.4 7.1 6.4 14.1
Single modes 7.3 5.3 15.8 11.1 6.2 16.9 16.4 4.3 23.6 7.8 7.8 14.6
Truck 7.2 5.7 15.2 11.3 7.3 16.1 8.3 6.4 12.7 8.7 6.5 13.8
Rail 24.0 10.4 33.0 38.2 15.4 58.9 32.4 15.2 46.1 12.2 9.8 13.4
Water S S S S S S S S S S S S
Air (including truck and air) 22.6 15.7 283.7 S 18.3 S S 14.1 S 2.2 3.4 4.5
Pipeline S 37.6 S S 49.4 S S S S S S S
Multiple modes 9.1 6.0 23.7 30.4 45.2 36.0 33.5 15.8 46.0 6.9 5.6 11.4
Parcel, USPS or courier 10.4 6.6 28.0 13.6 11.8 24.1 17.9 20.4 41.8 6.9 5.7 11.4
Truck and rail S 33.2 S 32.5 S S 38.4 22.3 48.8 10.2 14.5 29.3
Other multiple modes S S S S 42.0 S S 48.2 S 36.5 41.8 52.5
Other and unknown modes 14.6 29.0 31.9 26.1 25.0 30.1 35.3 26.7 33.4 18.7 17.0 32.0

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 23.5 14.7 40.9 S 24.4 S 38.2 30.4 56.1 39.0 24.9 50.2
Single modes 24.8 13.5 43.0 S 22.0 S 41.9 33.7 65.7 45.7 20.3 58.5
Truck 25.2 13.8 44.0 S 23.1 S S 36.5 S 45.7 20.5 58.9
Rail 45.8 S S 49.2 S S 45.7 S S 27.8 24.5 42.2
Water 42.6 S S 48.0 S S 47.0 S S 21.2 31.6 25.0
Air (including truck and air) S S S S S S 29.8
Pipeline S S S S S S
Multiple modes S 38.2 S S S S S S S 28.4 20.5 14.3
Parcel, USPS or courier S S S S S S S S S 28.2 21.0 13.4
Truck and rail S 46.7 S S S S S S S 31.6 44.6 166.2
Other multiple modes
Other and unknown modes S S S 42.0 S S 36.3 S S 24.6 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 12.8 7.4 16.4 14.6 9.5 17.5 10.9 17.2 22.6 16.8 12.2 69.7
Single modes 13.0 7.6 16.4 14.5 8.8 17.2 11.0 18.7 24.5 34.2 13.6 42.0
Truck 13.2 7.3 16.4 15.4 8.0 16.7 12.4 12.4 20.2 35.4 12.2 42.1
Rail 12.9 36.6 35.5 15.3 34.9 31.6 15.3 44.6 31.3 9.8 21.8 15.4
Water S S S S S S 28.4
Air (including truck and air) S S S S S S S S S 32.3 29.2 39.4
Pipeline S S S S S S S S S S
Multiple modes 20.8 41.3 98.1 20.8 S S 23.7 46.6 32.4 25.3 S S
Parcel, USPS or courier 36.8 40.7 832.8 S S S S 35.9 S 20.4 36.4 116.3
Truck and rail 37.6 45.6 58.0 24.3 S S 28.5 46.7 29.5 17.0 26.3 52.9
Other multiple modes
Other and unknown modes S 36.2 S 38.8 S S S S S 30.7 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 14.1 17.1 17.1 15.5 14.6 17.9 28.4 16.6 18.2 42.9 34.6 34.3
Single modes 16.2 15.3 18.2 15.8 14.6 18.0 33.1 16.0 18.9 28.9 42.1 32.3
Truck 15.8 16.2 19.1 16.0 14.9 18.7 34.8 18.7 23.4 29.2 41.2 32.9
Rail S 27.5 S S 34.3 S S 26.5 S 31.6 22.4 25.1
Water S S S S S S 31.6
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S 45.2 S S S S S S S 31.6 39.5 26.3
Parcel, USPS or courier S S S S S S S S S 31.6 40.0 20.3
Truck and rail S S S S S S 28.9
Other multiple modes S S S S S S S S S 31.6 25.8 42.3
Other and unknown modes S S S S 40.7 S S S S 29.9 31.9 27.3

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 21.9 10.2 65.7 29.8 10.9 67.7 28.0 34.9 123.7 11.5 40.3 45.0
Single modes 21.9 10.0 66.4 29.8 10.8 67.9 28.0 34.6 124.4 12.7 40.7 44.4
Truck 13.6 10.4 34.1 13.0 10.7 23.9 10.8 14.2 32.4 10.2 40.8 38.0
Rail S S S 45.0 S S 45.5 S S 26.0 31.8 86.8
Water S S S S S S S S S S 31.9 S
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes 44.3 S S 43.9 S S S S S 24.6 28.8 107.4
Parcel, USPS or courier 44.3 S S 43.9 S S S S S 24.6 28.8 107.4
Truck and rail
Other multiple modes
Other and unknown modes S S S S 48.2 S S S S 32.9 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 22.4 4.9 81.2 48.6 10.7 97.6 45.3 7.3 114.0 21.7 12.8 30.1
Single modes 24.1 5.6 88.8 49.2 11.1 100.5 46.1 7.9 119.5 16.0 10.4 37.7
Truck 27.6 6.1 97.5 25.4 10.9 36.0 22.7 8.0 42.3 15.2 10.8 19.1
Rail 44.5 13.3 62.5 S 16.1 S S 13.8 S 17.5 8.2 17.3
Water S S S S S S S S S S 31.6 S
Air (including truck and air) 18.3 S S 25.3 34.1 148.3 21.3 35.8 115.3 3.8 24.3 22.3
Pipeline S 46.6 S S S S S S S S S S
Multiple modes 26.9 34.1 140.7 22.8 26.2 28.3 20.5 23.8 41.0 39.4 9.5 25.0
Parcel, USPS or courier 27.5 14.8 178.8 34.2 11.5 66.7 26.5 17.7 56.1 39.5 9.5 25.0
Truck and rail 35.9 S S 46.2 36.0 28.1 37.9 32.8 53.8 21.7 19.8 62.5
Other multiple modes S S S S S S S S S 30.1 31.6 369.2
Other and unknown modes 32.7 38.7 132.9 S 37.1 S 49.4 49.8 19.6 29.9 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 9.9 12.3 14.8 11.7 6.7 15.3 12.1 11.8 15.6 7.7 5.5 11.9
Single modes 10.6 13.9 16.7 12.0 6.7 15.8 12.1 11.9 16.0 15.3 6.3 18.2
Truck 10.1 14.6 16.7 13.4 7.7 18.9 14.0 15.8 21.7 14.2 7.9 14.2
Rail 13.9 15.2 17.1 16.3 17.0 16.4 21.0 19.1 18.2 7.6 9.8 10.7
Water S S S S S S S S S 31.6 S S
Air (including truck and air) S 23.7 S S 33.4 S S 17.0 S 8.1 7.0 12.9
Pipeline S S S S S S S S S S
Multiple modes 19.3 7.5 18.9 15.4 9.9 15.0 22.9 17.3 22.0 3.9 6.6 10.2
Parcel, USPS or courier 21.2 9.4 22.3 25.0 11.0 33.7 22.3 12.4 30.6 3.9 6.6 10.2
Truck and rail 44.5 18.8 20.0 48.6 21.0 27.0 S 26.4 S 21.1 12.5 27.5
Other multiple modes S S S S S S 31.6
Other and unknown modes 25.9 33.3 21.0 21.9 26.0 15.0 26.9 46.5 7.9 40.5 33.0 49.8

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 9.4 10.6 16.0 28.7 25.0 45.2 6.8 9.0 10.9 13.4 9.7 26.5
Single modes 9.1 11.6 16.8 29.0 25.3 46.0 6.7 8.1 10.3 15.3 6.4 19.4
Truck 9.6 12.3 18.0 30.2 26.1 48.2 7.2 6.3 10.0 14.8 7.8 20.1
Rail 44.2 28.7 33.0 S 18.2 S 44.2 25.3 30.1 35.2 10.4 32.5
Water S S S S S S S S
Air (including truck and air) 32.4 29.4 64.0 S 31.7 S S 27.9 S 4.0 6.3 7.8
Pipeline S S S S S S
Multiple modes 28.4 17.3 47.9 31.6 24.7 48.7 34.6 15.3 71.9 8.8 11.3 23.2
Parcel, USPS or courier 30.3 17.5 47.9 28.6 13.5 31.8 33.1 14.3 53.5 8.9 11.3 23.4
Truck and rail 38.7 40.5 520.5 S 42.3 S S S S 27.1 25.6 22.6
Other multiple modes S S S S S S S 47.9 S 31.6 S S
Other and unknown modes 41.6 9.5 26.2 43.6 27.4 32.8 46.7 38.8 24.8 26.0 22.0 53.4

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 9.6 15.6 33.2 20.9 16.4 54.0 22.8 10.5 53.7 9.7 11.9 26.2
Single modes 9.1 13.6 27.9 21.9 13.5 52.8 24.2 10.5 51.6 21.5 18.0 55.4
Truck 14.9 14.7 30.4 22.0 13.6 53.6 24.6 11.2 55.0 25.4 20.8 69.1
Rail S 43.7 S S 25.2 S S 24.9 S 29.9 17.3 13.0
Water
Air (including truck and air) 44.6 18.8 389.0 S 18.4 S S 19.3 S 4.9 4.3 7.4
Pipeline S S S S S S
Multiple modes 29.2 20.2 116.6 39.0 8.6 181.9 39.1 19.8 362.5 8.5 9.2 17.9
Parcel, USPS or courier 20.4 20.6 71.6 19.0 7.9 33.9 28.4 11.3 68.6 8.6 9.2 17.9
Truck and rail S 39.8 S S 47.9 S S S S 27.7 21.4 23.2
Other multiple modes S S S S S S 27.9
Other and unknown modes 24.3 S S 26.0 S S 34.3 26.6 142.8 18.9 34.1 40.9

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 10.1 4.8 27.7 26.2 16.2 69.0 37.4 12.4 110.2 9.1 12.5 19.1
Single modes 11.1 5.4 30.8 26.2 16.7 68.4 37.3 13.8 112.9 18.8 20.2 21.9
Truck 11.5 5.3 31.6 12.6 16.0 38.7 12.2 10.5 27.0 18.4 16.9 28.9
Rail S 27.2 S S 29.9 S S 38.1 S 29.5 27.9 102.1
Water S S S S S S S S S 29.8 31.6 47.3
Air (including truck and air) S S S 37.0 45.2 168.0 42.4 42.9 193.6 13.0 8.4 20.2
Pipeline S S S S S S S S S S S S
Multiple modes 12.7 12.3 38.9 17.4 39.6 39.4 18.7 48.9 38.1 6.0 9.7 14.5
Parcel, USPS or courier 12.8 10.5 39.1 18.1 43.1 60.0 20.3 S S 5.9 9.8 14.5
Truck and rail 41.4 S S 42.3 S S 42.5 S S 25.8 19.4 40.4
Other multiple modes S S S S S S 31.2
Other and unknown modes S 22.8 S S 36.9 S S 47.0 S S 45.5 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 47.5 S S S S S S S S 21.9 35.9 111.1
Single modes 38.0 S S S S S S S S S 27.7 S
Truck 38.4 S S 47.1 S S S S S S 33.5 S
Rail S S S S S S S S S 36.5 31.4 11.6
Water
Air (including truck and air) S S S S S S 24.9
Pipeline S S S S S S
Multiple modes S S S S S S S S S 22.9 49.1 133.1
Parcel, USPS or courier S 47.3 S S S S S S S 22.9 S S
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes S S S S S S S S S 29.3 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.