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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 6.6 6.3 11.8 16.3 5.3 23.6 14.2 8.3 15.8 15.0 10.9 29.8
Single modes 7.3 6.9 12.8 15.9 5.5 23.0 14.4 8.2 16.1 16.8 15.2 29.9
Truck 6.4 6.4 11.5 18.7 6.3 33.0 8.9 5.1 13.4 14.9 15.7 21.7
Rail 23.6 19.7 48.8 21.6 13.2 16.9 25.2 16.2 22.4 11.6 14.2 16.3
Water S S S S S S S S S 27.9 31.6 S
Air (including truck and air) 25.1 28.2 41.6 34.5 32.5 43.2 31.2 30.0 46.3 5.6 2.1 6.7
Pipeline S 24.9 S S 29.8 S S S S S S S
Multiple modes 10.4 12.7 17.7 S 20.2 S S 32.5 S 14.4 4.5 18.5
Parcel, USPS or courier 10.3 14.3 19.6 20.6 20.0 33.7 23.5 14.5 30.9 14.5 4.6 18.6
Truck and rail S 27.5 S S 30.3 S S 27.9 S 38.0 11.4 14.2
Other multiple modes S S S S S S S S S 29.8 30.0 27.0
Other and unknown modes 31.8 14.9 99.4 24.4 22.2 47.8 26.8 30.9 56.0 42.1 S 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 9.5 16.2 22.9 21.6 8.4 32.4 23.6 16.9 31.3 49.3 29.4 46.7
Single modes 9.7 16.4 23.0 20.1 8.6 29.9 23.6 16.9 31.9 S 23.8 S
Truck 8.9 20.5 28.3 24.2 12.2 45.2 18.9 17.9 30.3 S 25.5 S
Rail 23.3 17.2 26.7 27.9 16.6 28.7 31.6 26.6 42.0 S 18.8 S
Water S S S S S S S S S 27.9 31.6 S
Air (including truck and air) – S S – S S – S S – 31.6 –
Pipeline – S S – S S S S S S S S
Multiple modes S 28.9 S S 35.7 S S 48.1 S S S S
Parcel, USPS or courier S S S S S S S S S S 34.4 S
Truck and rail S 34.9 S S 37.7 S S 37.0 S 31.6 21.4 6.5
Other multiple modes – S S – S S – S S – 31.6 –
Other and unknown modes S 29.9 S 43.9 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 17.3 10.5 19.1 29.6 13.5 46.9 26.8 25.5 46.5 31.1 46.3 41.8
Single modes 17.5 11.1 19.8 28.6 12.2 45.9 25.7 24.0 47.4 30.4 21.1 54.9
Truck 18.2 12.2 21.7 30.1 13.0 57.6 30.5 15.4 103.9 29.8 16.5 51.9
Rail 22.5 26.8 22.3 25.2 28.0 28.0 20.0 31.2 17.8 18.6 13.7 15.8
Water – – – – – – – – – – – –
Air (including truck and air) S S S S S S S S S 29.9 21.6 37.0
Pipeline – – – – – – S S S S S S
Multiple modes 49.2 40.5 3.1 43.9 S S S S S 45.1 12.2 47.0
Parcel, USPS or courier S S S 36.2 S S 36.0 S S 18.7 15.7 18.8
Truck and rail – 36.8 – – S S – S S – 28.7 –
Other multiple modes S – S S – S S – S 31.6 – –
Other and unknown modes S 42.3 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 38.6 26.2 47.5 25.9 20.7 49.3 40.1 20.2 40.8 39.1 21.1 35.7
Single modes 39.6 28.1 53.7 26.5 21.3 50.8 41.8 20.3 43.6 40.8 18.9 37.7
Truck 37.5 24.5 53.3 26.3 22.9 54.7 36.5 21.3 58.5 42.0 18.1 40.4
Rail S S S S 32.9 S S 37.7 S 30.5 24.1 86.3
Water – – – – – – – – – – – –
Air (including truck and air) – – – – – – – – – – – –
Pipeline – – – – – – S S S S S S
Multiple modes 48.8 37.5 48.1 S 44.1 S 48.5 40.0 19.6 28.1 23.9 41.9
Parcel, USPS or courier – S S – S S – S S – 31.4 –
Truck and rail 48.8 38.6 52.7 S 44.1 S 48.5 40.0 19.6 28.1 28.2 32.3
Other multiple modes – – – – – – – – – – – –
Other and unknown modes S S S S S S S S S 29.9 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 22.7 17.3 38.5 25.2 22.1 36.5 26.3 27.8 14.7 37.1 31.1 20.4
Single modes 23.8 17.8 39.5 25.3 22.5 37.2 26.3 28.0 14.8 36.2 35.5 23.9
Truck 29.9 14.6 81.2 32.3 16.6 90.8 20.0 18.7 29.3 33.0 38.6 29.4
Rail S 45.0 S S S S S 46.9 S 27.9 41.7 101.1
Water – – – – – – – – – – – –
Air (including truck and air) – S S – S S – S S – 27.9 –
Pipeline S 25.5 S S 31.2 S S S S S S S
Multiple modes S 44.9 S S S S S 47.6 S S 22.7 S
Parcel, USPS or courier S 46.3 S S 47.8 S S S S S 26.2 S
Truck and rail – S S – S S – S S – 27.9 –
Other multiple modes S – S S – S S – S 31.6 – –
Other and unknown modes S S S S S S S S S 30.4 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 21.5 7.5 23.5 20.9 18.7 15.3 26.5 24.2 13.4 21.4 11.8 35.3
Single modes 22.2 7.2 24.0 21.9 19.6 16.2 26.7 25.0 13.7 17.6 17.9 60.0
Truck 22.6 8.6 27.3 23.2 9.3 21.3 31.1 24.1 26.8 36.3 19.1 62.3
Rail 21.5 23.6 9.6 26.5 42.9 11.3 23.0 35.7 7.5 18.3 12.9 20.6
Water – – – – – – – – – – – –
Air (including truck and air) S 37.0 S S 24.4 S S 25.2 S 14.4 13.1 17.3
Pipeline S 27.3 S S 35.4 S S S S S S S
Multiple modes 42.9 20.2 61.8 S 47.3 S S 31.4 S 38.7 5.2 24.9
Parcel, USPS or courier 36.8 28.1 65.7 23.8 25.5 36.0 29.0 26.7 31.7 38.9 5.3 25.0
Truck and rail S 36.7 S S 40.2 S S 41.1 S 29.9 19.3 38.7
Other multiple modes S S S S S S S S S 31.6 31.6 675.3
Other and unknown modes 36.5 46.8 27.7 S 48.0 S S S S S 20.7 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 40.1 35.4 57.2 11.3 13.1 9.4 29.5 21.3 20.9 10.2 11.8 26.2
Single modes 48.4 36.9 65.8 13.3 13.2 9.6 31.9 21.3 21.2 18.8 19.2 32.2
Truck 48.7 37.4 66.7 13.3 13.6 9.9 32.0 22.4 22.5 23.8 20.9 29.3
Rail S S S S S S S S S 31.6 30.5 7.1
Water – – – – – – – – – – – –
Air (including truck and air) 40.6 29.0 64.9 37.7 S S 49.7 S S 12.6 5.1 21.6
Pipeline – – – – – – S S S S S S
Multiple modes 13.7 31.1 30.5 20.2 41.1 31.7 21.8 29.2 35.7 7.9 7.7 16.8
Parcel, USPS or courier 13.7 31.1 30.5 20.2 41.1 31.7 21.8 29.2 35.7 7.9 7.7 16.8
Truck and rail – – – – – – – – – – – –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes 36.8 25.3 115.2 S 34.8 S 37.0 32.2 103.7 S 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 31.9 5.7 39.2 40.7 9.8 101.2 38.1 10.9 90.2 22.1 16.7 29.2
Single modes 25.7 6.6 29.2 40.9 10.2 103.2 37.0 10.9 85.9 25.0 17.5 33.7
Truck 24.5 6.7 27.7 41.4 10.1 99.0 31.5 10.5 63.2 25.6 19.3 36.9
Rail S 46.4 S S 29.5 S S 26.8 S 29.9 16.9 34.4
Water – – – – – – – – – – – –
Air (including truck and air) S 37.7 S S 48.4 S S 45.0 S 6.4 6.5 11.0
Pipeline S S S S S S S S S S S S
Multiple modes 25.2 10.9 24.7 S 15.7 S S 28.7 S 20.3 13.5 22.5
Parcel, USPS or courier 25.7 11.3 24.5 33.4 17.7 31.5 29.1 15.3 27.1 20.3 13.6 22.4
Truck and rail S S S S S S S S S 32.9 29.8 16.5
Other multiple modes S S S S S S S S S 35.7 31.6 17.1
Other and unknown modes S 37.1 S S 39.0 S S 43.4 S 45.9 S 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 9.0 17.3 30.3 30.0 14.0 96.2 22.9 20.4 59.8 23.7 16.8 37.0
Single modes 12.4 22.0 39.6 30.5 15.8 102.1 24.0 22.0 62.2 16.1 27.2 71.7
Truck 13.4 15.0 25.7 36.6 15.1 105.2 32.7 15.8 52.4 38.3 31.1 98.2
Rail 33.4 S S 34.3 S S 33.7 S S 20.0 21.6 16.3
Water – – – – – – – – – – – –
Air (including truck and air) 29.4 33.5 48.0 40.1 33.7 63.9 35.1 31.8 58.3 3.9 3.9 6.0
Pipeline – – – – – – S S S S S S
Multiple modes 15.6 16.3 24.1 34.2 11.1 39.5 30.3 13.7 23.7 20.3 3.9 16.3
Parcel, USPS or courier 16.1 17.1 25.8 34.7 14.7 63.8 32.4 18.6 42.0 20.3 3.9 16.3
Truck and rail S 36.3 S S 36.8 S S 34.6 S 30.0 25.1 50.5
Other multiple modes – – – – – – – – – – – –
Other and unknown modes 37.5 30.3 145.7 40.6 41.7 203.3 S 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 17.2 9.2 36.9 17.5 20.3 41.2 24.5 17.8 53.1 15.3 13.6 25.8
Single modes 20.1 10.6 42.5 18.7 20.3 41.0 26.3 18.4 55.4 38.1 27.0 26.4
Truck 20.2 10.6 43.8 18.8 18.9 45.1 26.3 13.5 67.9 33.2 29.8 18.8
Rail S 48.7 S S 35.2 S S 36.6 S 29.8 21.4 56.0
Water – – – – – – – – – – – –
Air (including truck and air) S 31.3 S S 37.2 S S 35.9 S 17.8 11.5 30.4
Pipeline – – – – – – S S S S S S
Multiple modes 32.1 13.9 66.7 S 12.0 S S 16.0 S 10.8 4.9 14.5
Parcel, USPS or courier 32.0 13.8 66.8 S 12.0 S S 10.2 S 10.8 5.0 14.5
Truck and rail S S S S S S S S S 31.6 30.7 43.5
Other multiple modes – S S – S S – S S – 31.6 –
Other and unknown modes S 34.8 S S 40.7 S S S S 41.1 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 32.0 42.0 15.4 S S S 40.8 S S 30.8 38.3 55.1
Single modes 33.0 42.3 18.6 S S S 43.0 S S 21.1 40.1 84.4
Truck 39.4 43.5 8.6 S 44.1 S 46.0 S S S 35.6 S
Rail – S S – S S – S S – 31.5 –
Water – – – – – – – – – – – –
Air (including truck and air) S S S S S S S S S 19.6 28.9 42.4
Pipeline – – – – – – S S S S S S
Multiple modes 40.1 S S 44.0 S S S S S S 29.1 S
Parcel, USPS or courier 40.1 S S 44.0 S S S S S S 29.1 S
Truck and rail – – – – – – – – – – – –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes S S S S 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.