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 14.5 5.3 22.4 13.4 13.7 21.8 19.1 28.8 34.7 9.6 8.3 20.1
Single modes 16.5 6.3 25.3 14.1 13.8 22.9 19.8 27.2 45.4 25.7 16.5 52.0
Truck 18.1 8.8 30.6 17.5 19.5 30.5 13.1 8.1 33.7 21.1 18.6 45.4
Rail 29.6 19.1 35.8 25.0 31.1 42.6 32.1 36.4 46.7 11.5 20.5 35.8
Water
Air (including truck and air) 24.7 14.5 26.2 S 22.4 S S 27.9 S 3.6 1.8 5.1
Pipeline 19.9 26.1 35.0 21.0 30.4 58.4 S S S S S S
Multiple modes 10.6 3.7 17.3 39.7 S S 43.6 S S 4.1 3.9 6.4
Parcel, USPS or courier 11.0 3.8 18.4 13.1 12.0 24.6 16.9 12.7 41.3 4.1 3.9 6.4
Truck and rail 40.6 S S S S S S S S 34.6 17.0 25.1
Other multiple modes 34.0 S S 40.4 S S 46.0 S S 38.9 21.4 18.3
Other and unknown modes 26.3 13.8 46.9 36.3 39.1 282.9 33.7 S S 48.3 23.9 108.4

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 S 20.1 S S 38.5 S S 45.8 S S 37.9 S
Single modes S 20.2 S S 39.3 S S 46.1 S S 38.3 S
Truck S 20.2 S S 39.3 S 46.2 46.1 56.9 S 38.3 S
Rail S S S S S S 30.3
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes 40.8 S S S S 23.5
Parcel, USPS or courier 31.9 43.9 49.4 23.2
Truck and rail S S S S S S 30.6
Other multiple modes
Other and unknown modes 31.4 45.2 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 20.0 20.8 62.2 12.2 24.8 58.5 16.7 42.9 145.0 23.7 34.0 90.9
Single modes 20.1 20.0 62.7 11.9 25.1 55.8 12.8 43.5 126.1 30.7 49.0 149.5
Truck 20.5 20.0 63.1 13.6 25.0 54.9 14.8 43.7 113.9 32.9 49.2 146.2
Rail S S S S S S S S S 29.8 31.6 18.3
Water
Air (including truck and air) S S S S S S S S S 31.6 36.7 137.8
Pipeline S S S S S S
Multiple modes 50.0 S S S S S S S S 21.3 22.3 38.8
Parcel, USPS or courier S S S S S S S S S 26.7 22.2 43.7
Truck and rail S S S S S S S S S 29.8 31.6 154.2
Other multiple modes S S S S S S 29.9
Other and unknown modes S S S S S S S S S S 30.7 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 22.9 27.3 20.9 28.2 41.4 19.5 S 33.5 S 48.8 31.4 535.1
Single modes 30.7 27.8 14.7 33.3 40.8 18.9 S 36.0 S S 29.6 S
Truck 30.4 26.4 31.6 31.5 43.1 13.0 31.7 47.4 105.4 S 30.0 S
Rail S S S S S S S S S 26.6 29.8 43.0
Water
Air (including truck and air)
Pipeline S 41.0 S S 41.0 S S S S S S S
Multiple modes 39.4 S S S S S S S S 25.7 31.6 30.5
Parcel, USPS or courier 39.4 S S S S S S S S 25.7 31.6 30.5
Truck and rail
Other multiple modes
Other and unknown modes 47.2 S S 47.0 S S S S S 41.3 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 17.6 14.3 41.4 15.7 24.9 44.2 11.2 39.8 22.3 13.9 23.0 29.7
Single modes 17.7 13.5 41.8 15.3 22.6 45.7 11.4 42.5 37.3 11.6 23.6 28.1
Truck 21.3 12.6 51.0 24.1 15.6 75.0 27.3 40.0 166.9 12.4 23.8 29.8
Rail 25.8 36.7 27.1 23.8 42.8 34.5 24.9 45.3 26.0 22.6 19.1 24.4
Water
Air (including truck and air) S S S S S S 31.6
Pipeline 20.1 37.5 82.8 23.7 37.5 86.1 S S S S S S
Multiple modes S S S S S S S S S 46.1 24.7 33.9
Parcel, USPS or courier S S S S S S S S S 43.0 36.7 50.0
Truck and rail S S S S S S S S S 31.6 26.0 3.8
Other multiple modes
Other and unknown modes 38.4 S S 45.7 S S 37.8 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 15.1 8.8 22.3 42.8 18.8 100.6 36.1 27.7 79.5 21.2 16.5 18.9
Single modes 16.2 13.5 29.0 42.4 18.4 99.1 35.9 27.5 79.8 S 35.2 S
Truck 17.3 13.5 29.8 35.4 20.7 79.6 25.1 32.8 68.6 41.3 47.1 93.6
Rail S 38.6 S S 30.0 S S 32.5 S 49.4 13.2 19.4
Water
Air (including truck and air) S S S 36.7 S S 39.4 S S 12.3 14.5 22.2
Pipeline S S S S S S S S S S S S
Multiple modes 31.3 11.4 29.6 S 23.2 S S 19.7 S 13.3 11.8 14.1
Parcel, USPS or courier 31.6 11.4 29.4 38.4 22.4 37.8 S 19.6 S 13.3 11.8 14.1
Truck and rail S S S S S S S S S S 31.6 S
Other multiple modes S S S S S S 37.9
Other and unknown modes S S S S S S S 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 22.7 8.1 34.5 19.4 17.2 27.6 44.1 11.4 122.3 11.8 5.8 17.1
Single modes 23.5 7.7 29.4 20.8 17.6 27.6 S 10.7 S 18.1 12.1 22.4
Truck 23.6 8.0 29.9 18.8 17.6 25.4 49.0 11.0 128.0 19.3 16.6 36.7
Rail S S S S S S 31.0
Water
Air (including truck and air) S 26.2 S S S S S 44.3 S 16.7 11.2 25.2
Pipeline S S S S S S
Multiple modes 36.1 23.6 115.9 27.4 21.4 65.4 32.2 39.9 131.6 4.9 4.5 7.6
Parcel, USPS or courier 36.1 23.9 117.0 27.2 20.9 71.3 32.4 24.0 164.1 4.9 4.6 7.7
Truck and rail S S S S S S 31.6
Other multiple modes 43.7 S S S S S S S S 25.8 31.6 39.4
Other and unknown modes 41.0 20.8 61.9 S 27.2 S S 30.3 S 37.9 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 12.3 7.7 17.4 25.0 10.8 30.3 40.8 9.1 159.4 18.7 11.1 43.2
Single modes 15.0 8.2 20.0 23.5 11.2 29.0 40.3 9.5 160.9 20.3 20.6 48.7
Truck 10.1 6.7 12.8 15.7 12.8 14.2 30.8 8.4 56.6 18.6 24.6 55.1
Rail S 36.0 S 43.9 22.4 260.3 48.7 21.3 508.5 15.7 33.3 58.3
Water
Air (including truck and air) 48.5 48.1 29.1 S 30.6 S S 32.8 S 15.4 6.0 20.4
Pipeline S S S S S S S S S S
Multiple modes 16.5 12.2 48.5 S 33.7 S S 43.7 S 11.0 10.2 18.9
Parcel, USPS or courier 17.7 14.8 53.6 19.8 23.3 43.2 33.6 28.2 80.9 11.4 10.2 19.3
Truck and rail 39.1 44.7 195.4 S S S S S S 26.0 26.1 20.4
Other multiple modes S S S S S S S S S S 23.8 S
Other and unknown modes 29.6 21.9 25.8 S S S S 35.8 S 49.1 39.1 103.1

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 S 20.0 S S 22.8 S 37.2 26.7 81.7 11.6 12.4 32.9
Single modes S 23.5 S S 24.0 S 39.5 28.2 86.7 34.2 23.7 59.8
Truck S 34.0 S S 23.5 S 39.0 33.1 109.0 S 44.8 S
Rail S 20.8 S S S S S S S 28.2 24.0 26.4
Water
Air (including truck and air) 29.7 6.2 30.6 S 27.7 S S 28.6 S 4.0 1.9 5.7
Pipeline S S S S S S S S S S
Multiple modes 14.2 14.7 31.8 29.9 17.9 39.2 26.6 23.6 69.9 4.0 4.3 9.9
Parcel, USPS or courier 14.5 14.7 31.9 38.7 17.9 38.9 38.9 23.6 55.9 4.0 4.3 9.9
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S 25.8
Other and unknown modes S 27.5 S S 32.4 S 44.9 46.6 60.1 49.2 35.6 147.2

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 9.4 8.3 28.3 15.8 S S 21.3 S S 13.4 11.4 17.8
Single modes 11.8 10.8 38.2 16.1 S S 22.0 S S 27.4 44.0 48.6
Truck 11.8 12.6 44.5 16.0 S S 21.6 35.7 82.4 26.3 36.5 95.0
Rail S 43.7 S S S S S S S 31.6 S S
Water
Air (including truck and air) 46.6 47.4 19.6 44.3 S S S S S 13.6 5.1 16.1
Pipeline S S S S S S
Multiple modes 16.2 25.9 56.0 32.4 34.8 45.3 32.1 39.5 42.8 11.2 9.1 13.3
Parcel, USPS or courier 16.4 26.8 60.0 31.1 24.4 83.1 30.2 16.4 76.4 11.2 9.1 13.3
Truck and rail S 44.7 S S S S S 47.3 S 28.0 22.0 42.3
Other multiple modes S S S S S S S S S 44.6 31.6 13.1
Other and unknown modes 32.5 40.1 52.9 38.4 49.8 92.3 34.8 45.9 21.7 S 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 S S S S 42.9 S S S S 17.8 28.2 45.7
Single modes S S S S 43.0 S S S S 33.6 28.9 14.7
Truck S S S S 43.0 S S S S 43.9 28.9 13.7
Rail
Water
Air (including truck and air) S S S S S S 29.3
Pipeline S S S S S S
Multiple modes S S S S S S S S S 19.5 28.9 56.8
Parcel, USPS or courier S S S 41.4 S S 39.0 S S 19.5 28.9 56.9
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 S 31.6 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.