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 8.8 6.4 10.9 17.3 13.2 22.8 8.4 21.6 10.4 14.4 7.6 35.8
Single modes 10.8 8.1 13.6 17.9 13.9 24.2 8.9 25.4 12.7 27.9 9.9 34.2
Truck 11.0 8.7 16.0 18.1 14.8 25.9 8.1 25.8 13.6 25.2 10.6 22.5
Rail 36.8 38.2 5.5 31.9 29.1 19.3 34.2 32.9 16.8 25.6 17.0 25.5
Water 1.0 S S S S S S
Air (including truck and air) 23.2 17.1 10.1 36.2 20.7 9.8 35.8 14.6 13.3 9.7 6.2 17.2
Pipeline S S S S S S
Multiple modes 8.3 8.4 12.5 29.7 36.7 60.4 13.7 S S 7.8 5.9 15.0
Parcel, USPS or courier 8.2 8.5 12.5 10.2 13.1 23.4 14.5 15.8 33.1 7.8 5.9 15.1
Truck and rail S 46.6 S S S S 48.2 S S S 26.2 S
Other multiple modes S S S S S S S S S S 27.6 S
Other and unknown modes 18.3 18.0 17.6 22.9 24.5 10.4 12.9 40.9 6.1 48.9 28.9 36.2

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 27.7 36.0 53.0 43.3 S S 46.2 S S 27.7 S S
Single modes 29.8 36.8 49.8 43.9 S S 47.5 S S 29.0 S S
Truck 29.8 36.8 49.7 43.9 S S 47.8 S S 28.4 S S
Rail
Water
Air (including truck and air) S S S S S S S S S S 31.6 S
Pipeline S S S S S S
Multiple modes S S S S S S S S S 31.1 30.1 186.1
Parcel, USPS or courier S S S S S S S S S 31.3 30.1 186.6
Truck and rail
Other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S S S S 42.2 30.7 361.0

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 16.5 13.3 18.6 20.1 16.1 23.3 26.7 24.5 23.0 S 23.0 S
Single modes 16.5 12.5 19.9 20.1 15.9 24.2 26.9 25.4 26.7 S 17.1 S
Truck 16.5 12.5 19.9 20.1 15.9 24.2 26.9 25.5 26.7 S 17.0 S
Rail
Water
Air (including truck and air) S S S S 48.7 31.3
Pipeline S S S S S S
Multiple modes 49.0 S S 46.2 S S S S S 26.8 16.1 25.0
Parcel, USPS or courier 49.0 S S 46.2 S S S S S 26.8 16.0 25.4
Truck and rail
Other multiple modes S S S S S S 31.6
Other and unknown modes S S S S S S 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 24.3 19.5 24.3 7.1 18.6 20.3 22.3 23.6 25.7 13.1 S S
Single modes 22.0 18.5 22.3 7.2 18.3 19.9 23.0 23.6 25.9 13.9 S S
Truck 22.2 20.0 23.2 7.1 19.5 22.3 16.0 25.7 21.6 11.8 S S
Rail 42.4 45.0 89.6 42.5 41.1 64.9 43.9 46.7 104.6 25.9 24.9 43.9
Water S S S S S S 31.6
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S 31.6 26.3 6.7
Parcel, USPS or courier S S S S S S S S S 31.6 26.3 6.7
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S S 36.9 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 23.7 12.5 32.0 26.6 10.2 18.7 27.5 18.6 36.2 24.2 18.7 131.5
Single modes 24.1 12.6 32.3 27.2 10.2 18.9 27.7 18.6 36.2 25.4 19.9 144.7
Truck 24.1 12.6 32.3 27.2 10.2 18.9 27.7 18.6 36.2 25.4 19.9 144.7
Rail
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S 35.8 S S
Parcel, USPS or courier S S S S S S S S S 35.8 S S
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S S 33.6 32.1 253.1

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 38.9 16.7 64.8 27.6 10.0 53.2 9.6 17.3 10.2 21.4 9.5 20.4
Single modes 41.6 14.3 73.0 28.3 10.5 54.9 11.1 18.0 10.1 S 19.9 S
Truck 43.0 11.1 85.7 29.5 10.7 61.6 7.9 18.8 11.0 S 17.8 S
Rail S 35.1 S S 30.1 S S 43.6 S 28.4 22.3 13.9
Water S S S S S S 31.6
Air (including truck and air) S S S 34.1 S S 33.1 S S 18.2 14.9 27.7
Pipeline S S S S S S
Multiple modes 36.3 36.7 54.9 26.9 19.5 55.3 33.1 23.6 91.9 8.9 13.2 19.2
Parcel, USPS or courier 36.4 36.9 55.0 25.9 20.8 48.9 31.1 21.2 76.1 8.9 13.2 19.2
Truck and rail S S S S S S S S S 26.9 31.0 64.5
Other multiple modes
Other and unknown modes S 45.2 S S S S 34.0 S 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 9.8 9.8 18.4 8.0 14.6 21.8 15.3 19.6 35.1 11.2 8.2 22.9
Single modes 12.2 14.2 21.6 8.4 15.5 23.1 16.5 21.5 36.4 26.7 S S
Truck 12.3 14.4 21.9 8.3 15.2 22.8 16.6 20.1 35.0 22.0 S S
Rail S S S S S S S S S 29.9 31.6 136.4
Water S S S S S S 31.6
Air (including truck and air) 41.0 44.9 30.2 37.9 44.1 34.2 S S S 24.0 31.4 51.4
Pipeline S S S S S S
Multiple modes 19.5 11.0 42.5 19.9 31.9 56.7 18.9 26.4 53.0 8.2 12.0 16.1
Parcel, USPS or courier 19.5 11.0 42.5 19.9 31.9 56.8 18.9 26.4 53.1 8.2 12.0 16.1
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 35.1 34.3 85.2 30.8 18.7 46.2 36.1 27.3 299.1 33.1 29.1 69.5

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 11.4 14.4 14.7 44.1 17.1 88.7 14.1 29.1 12.8 22.5 13.9 22.1
Single modes 12.6 14.8 15.9 45.6 20.7 104.7 15.9 34.6 18.0 45.5 13.8 40.6
Truck 12.7 13.7 17.0 46.0 20.1 109.6 14.2 34.0 18.8 47.0 16.6 46.9
Rail S S S S S S S S S 28.2 28.4 26.2
Water S S S S S S 29.8
Air (including truck and air) 38.6 37.3 11.1 28.1 35.9 4.5 43.9 29.1 8.7 13.6 15.5 24.1
Pipeline S S S S S S
Multiple modes 15.6 19.6 20.7 S 18.9 S 24.9 26.3 42.2 13.2 12.7 17.5
Parcel, USPS or courier 16.0 19.7 20.8 20.8 17.3 27.6 28.0 18.2 40.5 13.2 12.8 17.5
Truck and rail S S S S S S S S S 31.6 31.6 0.7
Other multiple modes S S S S S S S S
Other and unknown modes 36.4 41.0 19.2 26.1 43.4 4.3 35.0 S S 40.5 39.7 75.3

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 11.8 9.2 9.6 19.4 15.2 14.2 13.3 14.3 16.3 13.9 12.4 26.2
Single modes 19.1 12.1 9.8 22.0 17.0 15.8 18.1 14.6 16.4 23.0 28.6 93.8
Truck 19.8 15.6 12.4 22.2 17.8 17.0 18.9 14.0 16.7 S 28.1 S
Rail S S S S S S 31.6
Water 31.6
Air (including truck and air) 29.4 17.3 24.6 S 24.4 S S 35.0 S 8.7 9.3 19.6
Pipeline S S S S S S
Multiple modes 14.1 12.9 22.7 26.3 16.0 33.2 24.6 21.1 42.1 10.9 7.0 14.4
Parcel, USPS or courier 14.1 12.9 22.7 26.3 16.0 33.2 24.6 21.1 42.1 10.9 7.0 14.4
Truck and rail
Other multiple modes
Other and unknown modes 37.7 26.6 26.5 35.1 41.8 11.9 43.5 40.2 154.1 S 33.0 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 29.6 21.3 54.6 40.0 41.0 34.6 27.3 36.4 7.7 15.9 10.4 33.5
Single modes 32.3 24.6 70.0 40.6 43.9 37.4 26.6 43.6 8.3 39.4 23.6 13.3
Truck 32.2 24.5 81.1 40.6 48.2 42.8 26.6 49.0 10.3 35.9 23.3 12.7
Rail S S 49.3 S S 22.8
Water S S S S S S 31.6
Air (including truck and air) S 37.9 S 34.1 S S 44.8 29.5 23.4 15.6 13.1 28.0
Pipeline S S S S S S
Multiple modes 20.7 17.6 16.2 32.5 S S 43.9 S S 9.8 10.7 21.1
Parcel, USPS or courier 20.7 17.6 16.5 32.5 23.0 116.4 43.9 33.5 195.3 9.8 10.7 21.1
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S 30.6
Other and unknown modes 41.8 39.8 37.5 38.1 S S S S S 39.8 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 39.1 43.4 7.5 45.8 43.1 32.8 S 34.2 S 38.5 24.6 33.2
Single modes 27.4 46.1 7.5 45.9 43.8 33.9 S 34.0 S S 44.0 S
Truck 28.3 44.7 6.4 S 48.2 S 40.1 36.8 7.4 S 46.7 S
Rail S S S S S S S S S 31.6 31.6 111.6
Water
Air (including truck and air) S S S S S S S S S 30.3 30.2 51.4
Pipeline S S S S S S
Multiple modes S S S 43.0 S S S S S 27.6 22.2 43.3
Parcel, USPS or courier S S S 43.0 S S S S S 27.6 22.2 43.3
Truck and rail
Other multiple modes
Other and unknown modes 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.