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Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997

Monday, July 2, 2012

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 10.2 8.8 17.4 17.1 10.5 16.7 13.7 13.8 18.1 13.9 13.1 15.5
Single modes 11.8 6.7 19.8 16.5 10.6 16.1 14.1 13.3 18.8 17.1 14.4 26.6
Truck 15.8 4.9 24.8 22.1 12.8 21.1 21.0 16.2 27.9 16.1 13.1 23.4
Rail 26.5 31.2 25.2 32.9 32.4 33.8 22.0 26.6 23.5 S 13.4 S
Water S S S S S S 31.6
Air (including truck and air) 22.4 28.7 55.6 49.5 13.8 112.2 S 12.1 S 5.0 3.5 7.1
Pipeline S 37.7 S S 40.6 S S S S S S S
Multiple modes 16.2 27.8 26.1 23.7 33.9 32.5 15.9 28.1 20.7 4.7 7.5 7.9
Parcel, USPS or courier 16.7 28.1 26.1 24.4 15.6 29.4 22.5 24.2 23.8 4.7 7.5 7.9
Truck and rail S S S S S S 42.8 S S S 42.5 S
Other multiple modes 47.1 40.0 250.4 34.6 42.9 27.7 34.8 43.0 25.6 24.3 34.5 56.0
Other and unknown modes 40.3 16.4 50.5 S 48.8 S 26.2 S S S 35.6 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 25.4 37.8 27.8 24.5 S S 42.2 S S S 30.7 S
Single modes 25.6 38.2 28.7 24.8 S S 44.0 S S S 30.3 S
Truck 25.7 38.8 29.4 25.2 S S 44.0 S S S 30.4 S
Rail S S S S S S S S S 31.6 30.5 0.2
Water
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S 46.6 S S S S S S S S 35.9 S
Parcel, USPS or courier S S S S S S S S S 31.6 29.2 4.5
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S S S S 29.8 27.9 38.2
Other and unknown modes S S S S 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 11.1 13.4 16.5 18.0 22.8 26.5 24.7 15.3 34.3 S 26.6 S
Single modes 9.7 13.5 15.2 18.0 22.9 26.5 24.7 15.4 34.5 S 8.9 S
Truck 9.8 13.5 15.2 17.5 22.9 25.8 24.1 15.4 29.4 S 9.0 S
Rail 49.5 S S S S 28.5
Water
Air (including truck and air) S S S S S S 30.9
Pipeline S S S S S S S S S S
Multiple modes S S S S S S S S S 33.9 28.1 21.5
Parcel, USPS or courier S S S S S S S S S 33.9 24.9 20.6
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 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 34.6 18.7 30.0 S 27.5 S 45.0 28.8 48.7 S 25.8 S
Single modes 33.4 18.8 24.3 S 27.6 S 46.5 28.9 47.9 S 25.9 S
Truck 34.8 24.1 36.7 S 30.8 S S 30.6 S S 27.0 S
Rail S 31.9 S 41.1 42.4 8.9 S 25.5 S S S S
Water
Air (including truck and air) S S S S S S S S S 29.8 30.0 87.7
Pipeline S S S S S S
Multiple modes S S S S S S S S S 28.8 30.1 490.0
Parcel, USPS or courier S S S S S S S S S 31.6 31.6 415.3
Truck and rail S S S S S S S S S 31.7 31.6 643.6
Other multiple modes
Other and unknown modes S S S S S S S S S S 30.4 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 10.8 26.1 33.0 22.0 9.6 32.5 17.6 13.6 27.0 38.7 11.5 23.8
Single modes 10.7 26.3 32.8 19.2 9.6 27.6 17.7 13.6 27.0 31.0 11.9 21.8
Truck 13.0 30.2 37.7 29.5 23.6 51.7 26.7 42.8 59.7 31.2 12.0 21.9
Rail 41.1 42.4 74.7 40.9 43.1 80.9 40.9 43.1 97.1 25.8 41.0 150.4
Water
Air (including truck and air) S S S S S S 46.0
Pipeline S 40.9 S S 40.8 S S S S S S S
Multiple modes S S S S S S S S S 31.6 S S
Parcel, USPS or courier S S S S S S S S S 31.6 S S
Truck and rail
Other multiple modes
Other and unknown modes S S S S 47.0 S S S S S 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 25.7 18.5 34.5 29.9 23.0 23.6 36.6 49.4 41.3 18.5 21.6 56.0
Single modes 29.0 22.5 41.0 30.3 22.6 23.5 38.3 47.5 42.7 38.8 10.1 35.9
Truck 28.8 23.6 43.3 29.7 22.2 24.3 47.3 21.5 63.3 32.7 15.0 50.0
Rail S 34.3 S S 38.9 S 41.0 S S S 30.6 S
Water
Air (including truck and air) S 23.5 S S 32.9 S S 39.4 S 9.3 11.1 20.6
Pipeline S S S S S S
Multiple modes 32.2 16.5 35.3 33.4 S S 44.4 S S 16.6 17.1 34.0
Parcel, USPS or courier 32.5 16.6 35.1 32.0 34.9 64.0 35.7 28.1 102.8 17.2 17.2 34.7
Truck and rail S S S S S S S S S 31.6 30.6 62.6
Other multiple modes S S S S S S S S S 27.9 31.6 39.5
Other and unknown modes S S S S 29.5 S S S S S 45.6 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 17.4 11.3 21.8 27.3 10.8 43.2 39.9 19.4 79.3 22.4 18.3 17.7
Single modes 13.8 12.4 21.3 27.9 11.0 44.3 41.3 21.2 83.9 26.2 10.7 22.7
Truck 13.1 13.0 21.1 28.1 10.6 44.3 45.6 17.8 90.0 29.0 13.3 24.3
Rail S S S S S S S S S 28.0 29.3 38.5
Water
Air (including truck and air) 48.0 35.9 17.1 S 47.5 S S S S 22.2 8.3 32.7
Pipeline S S S S S S
Multiple modes S 25.1 S S 17.4 S S 25.2 S 8.5 12.7 13.1
Parcel, USPS or courier S 25.1 S S 17.4 S S 25.2 S 8.5 12.7 13.1
Truck and rail
Other multiple modes S S S S S S 29.8
Other and unknown modes 28.7 37.0 45.2 38.9 44.6 63.0 S S S 33.0 S 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 13.2 7.4 16.5 14.4 17.2 12.1 11.9 26.3 17.8 19.1 12.8 21.6
Single modes 11.3 7.6 13.9 14.7 17.6 12.4 11.9 19.8 16.0 45.3 24.0 35.2
Truck 12.6 7.7 16.3 16.4 18.1 12.9 18.0 12.2 18.3 S 34.1 S
Rail 25.9 39.9 32.1 21.8 26.6 27.7 24.4 43.5 24.9 S 18.6 S
Water
Air (including truck and air) 45.2 S S S 26.9 S 47.4 24.4 6.5 9.1 3.8 13.6
Pipeline S S S S S S
Multiple modes 35.2 20.0 92.5 25.5 24.8 42.9 45.1 22.9 93.0 18.4 16.3 32.3
Parcel, USPS or courier 35.3 20.8 95.1 28.3 20.4 41.5 26.0 21.2 37.4 18.2 16.3 32.2
Truck and rail S S S S S S S S S 31.6 31.6 165.5
Other multiple modes S S S S S S S S S S 29.8 S
Other and unknown modes 30.4 29.4 39.0 29.1 S S S S S S 28.4 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 17.4 18.9 25.8 30.1 34.3 48.5 22.0 S S 10.6 10.8 16.1
Single modes 16.4 17.8 29.3 32.0 41.1 60.8 25.4 S S 18.7 22.5 64.1
Truck 18.4 17.1 20.2 33.5 42.2 61.7 30.6 S S 33.8 35.4 120.4
Rail S S S S S S S S S 31.6 31.6 184.2
Water
Air (including truck and air) 23.6 25.4 59.3 31.2 15.4 87.8 29.6 16.1 107.3 5.2 3.6 7.3
Pipeline S S S S S S
Multiple modes 22.8 35.7 30.1 27.7 31.9 24.2 29.8 41.2 20.0 6.0 8.5 10.4
Parcel, USPS or courier 22.8 36.1 30.6 27.7 34.1 26.8 29.8 43.4 21.5 6.0 8.5 10.4
Truck and rail S S S S S S 32.5
Other multiple modes S S S S S S S S S 31.6 31.6 S
Other and unknown modes S 20.5 S 33.7 37.1 30.7 S 46.3 S S S 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 34.2 18.1 152.1 S 12.9 S S 19.4 S 34.7 20.0 24.3
Single modes 35.4 20.9 181.4 S 13.2 S S 22.2 S 26.4 12.9 32.7
Truck 35.7 20.0 209.5 S 12.8 S S 15.4 S 28.8 13.5 38.7
Rail S S S S S S S S S 31.6 26.0 15.6
Water S S S S S S 31.6
Air (including truck and air) S S S S S S S 47.0 S 18.2 18.1 34.8
Pipeline S S S S S S
Multiple modes 34.5 40.1 47.8 S 30.2 S 38.5 38.5 25.4 12.6 8.5 13.6
Parcel, USPS or courier 33.1 40.9 46.8 S 37.7 S 44.8 S S 12.6 8.5 13.6
Truck and rail S S S S S S S S S 31.6 28.1 2.5
Other multiple modes S S S S S S S S S 27.9 31.6 44.3
Other and unknown modes S 26.4 S S 43.9 S S S S 29.0 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 42.0 20.1 18.1 26.0 S S 37.1 S S 49.5 27.9 26.1
Single modes 43.7 31.4 26.3 26.2 S S 37.9 S S S S S
Truck 35.9 35.4 20.0 26.3 S S 37.4 38.9 3.9 47.2 S S
Rail S S S S S S 31.6
Water
Air (including truck and air) S S S S S S S S S 29.6 26.3 52.7
Pipeline S S S S S S
Multiple modes 48.4 S S S S S S S S 26.8 25.5 28.3
Parcel, USPS or courier 48.4 S S S S S S S S 26.8 25.5 28.3
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S S 31.6 43.6 85.3

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.