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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 13.4 10.9 24.0 25.3 10.6 36.6 10.5 7.7 19.3 19.8 15.9 26.7
Single modes 14.3 12.3 26.9 25.6 10.7 37.8 11.1 7.5 21.5 18.4 10.3 20.7
Truck 14.8 12.3 28.1 27.1 11.0 38.8 11.5 7.9 19.3 15.5 7.3 18.2
Rail 26.7 S S 43.9 26.3 149.2 39.4 38.5 216.3 15.0 17.7 44.9
Water S – S S – S S – S 28.9 – –
Air (including truck and air) 36.5 18.2 38.1 46.2 24.9 43.3 42.9 30.8 73.9 8.3 8.3 18.6
Pipeline – S S – S S S S S S S S
Multiple modes 14.8 11.0 20.4 14.7 25.2 9.0 16.2 32.5 16.5 10.9 7.0 12.4
Parcel, USPS or courier 15.4 10.7 22.0 22.4 12.9 41.2 34.2 12.6 54.0 11.0 7.0 12.5
Truck and rail 36.1 40.9 15.8 36.5 29.2 6.5 39.7 38.3 12.4 29.6 29.9 39.2
Other multiple modes S 40.9 S S 40.8 S S 40.5 S 44.2 S S
Other and unknown modes 23.0 16.4 40.8 29.2 31.8 26.6 37.9 24.8 17.7 S 46.8 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 S 17.2 S S 17.6 S S 43.1 S S 30.1 S
Single modes S 16.5 S S 17.7 S S 43.4 S S 33.0 S
Truck S 15.7 S S 17.9 S S 44.0 S S 40.7 S
Rail S S S S S S S S S 35.3 29.8 229.3
Water – – – – – – – – – – – –
Air (including truck and air) S S S S S S S S S 31.6 31.6 49.4
Pipeline – – – – – – S S S S S S
Multiple modes S S S S S S S S S 26.5 25.7 23.1
Parcel, USPS or courier S S S S S S S S S 26.5 25.8 23.1
Truck and rail – S S – S S – S S – 29.9 –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes S 47.1 S S S S S S S S 32.6 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 12.3 7.2 14.3 13.9 9.3 16.0 23.4 15.3 36.7 24.8 16.2 47.1
Single modes 13.6 7.2 15.0 14.3 9.4 15.8 24.6 15.8 37.8 20.5 15.7 41.9
Truck 14.0 7.1 15.3 14.6 9.7 16.4 26.0 11.5 39.8 19.7 15.8 40.7
Rail S S S S S S S S S 28.9 24.2 39.0
Water – – – – – – – – – – – –
Air (including truck and air) S S S S S S S S S 41.4 29.9 59.4
Pipeline – – – – – – S S S S S S
Multiple modes S S S S S S S S S 28.6 31.4 36.0
Parcel, USPS or courier S 40.7 S S 34.5 S S 38.7 S 28.7 25.4 42.3
Truck and rail S S S S S S S S S 38.2 31.6 8.7
Other multiple modes S – S S – S S – S S – S
Other and unknown modes S 40.4 S S 45.8 S S 42.7 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 48.2 20.8 89.3 S 25.6 S 30.5 25.8 63.7 21.5 S S
Single modes 48.2 19.1 97.5 S 25.8 S 30.5 26.2 64.9 21.5 37.0 21.2
Truck 48.8 19.1 97.3 S 25.8 S 32.0 25.7 63.9 21.9 23.3 17.3
Rail – S S – S S – S S – 31.6 –
Water S – S S – S S – S 30.1 – –
Air (including truck and air) S S S S S S S S S 31.6 31.6 20.8
Pipeline – – – – – – S S S S S S
Multiple modes – S S – S S – S S – 45.4 –
Parcel, USPS or courier – S S – S S – S S – 25.1 –
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 31.6 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 26.1 15.5 7.6 37.1 23.5 21.8 40.4 25.0 18.4 33.0 13.9 40.0
Single modes 26.2 17.2 8.5 36.9 25.7 23.6 40.7 26.3 19.6 27.3 14.8 28.9
Truck 26.3 17.2 8.5 36.9 25.7 23.6 41.5 26.3 19.6 10.7 14.8 11.3
Rail – – – – – – – – – – – –
Water – – – – – – – – – – – –
Air (including truck and air) S – S S – S S – S 31.6 – –
Pipeline – – – – – – S S S S S S
Multiple modes S 40.9 S S 40.9 S S 41.1 S 29.8 S S
Parcel, USPS or courier S S S S 44.6 S S S S 29.8 27.5 42.7
Truck and rail – – – – – – – – – – – –
Other multiple modes – 40.9 – – 40.9 – – 41.2 – – 25.9 –
Other and unknown modes S S S S S S S S S 29.4 27.9 82.6

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 22.8 12.1 38.9 32.2 13.8 60.8 20.9 18.0 39.2 32.9 10.5 35.9
Single modes 16.5 12.4 30.6 32.9 11.9 70.3 23.0 12.1 55.6 19.1 6.4 37.8
Truck 17.9 13.0 32.6 35.4 12.1 77.9 27.5 16.0 73.6 18.3 10.7 47.1
Rail S 14.9 S S 24.3 S S 19.5 S 26.9 17.2 32.2
Water – – – – – – – – – – – –
Air (including truck and air) 47.1 42.0 65.6 S 46.4 S S S S 19.9 15.2 33.3
Pipeline – S S – S S S S S S S S
Multiple modes S 14.0 S 31.4 46.2 20.5 49.6 46.4 14.0 S 11.1 S
Parcel, USPS or courier S 18.1 S S 17.6 S 32.6 19.3 35.1 S 10.5 S
Truck and rail 42.4 49.4 11.3 S 49.7 S S 47.7 S 25.3 26.3 51.1
Other multiple modes S – S S – S S – S 30.7 – –
Other and unknown modes 35.0 43.8 6.6 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 42.9 11.8 122.9 42.5 16.0 85.7 14.7 10.5 25.1 18.3 12.9 13.9
Single modes 44.8 11.1 150.0 42.9 16.9 91.7 15.4 12.6 29.7 40.5 30.8 49.7
Truck 45.0 11.1 151.1 43.6 16.9 91.8 15.5 12.5 28.3 33.3 31.6 36.4
Rail S – S S – S S – S 49.2 – –
Water S – S S – S S – S 29.8 – –
Air (including truck and air) 44.6 25.7 9.7 46.3 S S S S S 20.1 9.5 42.1
Pipeline – – – – – – S S S S S S
Multiple modes 22.8 30.5 32.5 25.4 28.5 46.1 28.3 25.2 42.6 11.1 5.1 9.3
Parcel, USPS or courier 22.8 30.6 32.7 25.9 30.2 48.9 26.9 27.8 42.9 11.1 5.1 9.3
Truck and rail S S S S S S S S S 29.8 29.0 55.4
Other multiple modes S – S S – S S – S 31.6 – –
Other and unknown modes 34.5 26.8 19.8 22.7 30.9 4.2 42.9 40.3 4.5 S 36.4 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 12.6 11.1 21.4 26.1 15.1 24.7 34.0 14.3 83.5 26.1 17.5 23.8
Single modes 12.5 12.7 24.2 26.1 15.2 25.2 34.0 14.4 89.6 35.5 21.6 39.8
Truck 10.6 12.8 21.6 27.7 15.4 23.9 24.5 14.9 43.6 40.1 24.6 42.3
Rail S 35.9 S S 28.1 S S 23.1 S 26.2 27.0 124.0
Water – – – – – – – – – – – –
Air (including truck and air) S 35.4 S S 25.6 S S 38.1 S 16.0 15.5 29.8
Pipeline – – – – – – S S S S S S
Multiple modes 35.1 31.9 26.1 48.1 46.2 12.8 S 43.6 S 20.8 20.7 26.2
Parcel, USPS or courier 35.3 33.6 27.6 33.0 26.4 35.5 29.3 17.2 29.3 20.9 21.4 26.7
Truck and rail – S S – S S – S S – S S
Other multiple modes S S S S S S S S S 43.8 31.6 9.1
Other and unknown modes S 23.8 S 46.7 28.2 17.7 39.0 35.6 2.6 S 49.4 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 16.2 18.1 20.0 12.4 29.4 22.9 20.3 40.8 20.5 17.1 33.8 87.7
Single modes 24.0 21.3 19.7 22.1 29.8 17.5 23.2 45.5 22.3 S 38.1 S
Truck 25.9 20.6 22.3 22.0 31.7 21.1 23.7 30.3 35.3 S 37.3 S
Rail S S S S S S S S S 29.8 49.5 328.7
Water – – – – – – – – – – – –
Air (including truck and air) S 22.9 S 42.3 31.8 5.8 45.5 37.6 15.7 20.4 11.1 45.0
Pipeline – – – – – – S S S S S S
Multiple modes 18.1 17.3 33.0 13.7 24.1 27.0 17.9 30.9 24.7 13.4 15.7 26.8
Parcel, USPS or courier 18.2 17.2 33.1 14.2 23.7 29.1 16.2 24.1 28.9 13.7 15.8 27.0
Truck and rail S S S S S S S S S 32.4 27.9 26.3
Other multiple modes S – S S – S S – S 31.6 – –
Other and unknown modes 35.3 34.2 133.1 39.6 S S 43.4 S 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 20.8 34.4 40.9 42.0 36.8 47.5 S 18.9 S 25.8 24.8 37.2
Single modes 22.1 38.7 48.3 42.3 37.6 48.9 S 20.9 S 34.6 20.2 51.9
Truck 22.4 38.9 47.4 46.5 40.0 43.6 25.2 25.8 50.9 37.0 20.7 51.0
Rail S S S S S S S 49.2 S 28.7 29.4 136.0
Water – – – – – – – – – – – –
Air (including truck and air) S 32.5 S S S S S S S 30.7 28.3 92.0
Pipeline – S S – S S S S S S S S
Multiple modes 25.4 22.9 17.5 25.8 22.1 29.4 47.4 26.2 73.4 14.2 11.9 23.0
Parcel, USPS or courier 26.4 22.9 17.3 23.8 22.1 24.2 46.6 26.2 41.2 14.2 11.9 23.1
Truck and rail S – S S – S S – S 29.8 – –
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 21.8 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 35.6 S S 31.4 47.9 25.7 47.8 S S 30.4 42.3 296.9
Single modes 40.3 S S 34.2 48.6 24.4 S S S S S S
Truck 41.0 S S 34.2 48.6 24.3 S S S 45.8 S S
Rail – – – – – – – – – – – –
Water – – – – – – – – – – – –
Air (including truck and air) S S S S S S S S S 29.3 31.6 782.6
Pipeline – – – – – – S S S S S S
Multiple modes S S S S S S S S S 32.8 28.5 56.4
Parcel, USPS or courier S S S S S S S S S 32.8 28.5 56.4
Truck and rail – – – – – – – – – – – –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes S S S S S S S S S 45.9 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.