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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 20.9 19.7 37.9 8.9 21.0 32.4 23.7 46.5 53.8 20.5 17.4 31.8
Single modes 12.1 8.2 21.7 7.7 20.6 30.2 23.6 47.4 54.5 25.0 18.7 72.1
Truck 14.9 9.0 25.6 10.0 23.5 36.7 13.6 10.0 22.8 23.3 17.9 54.0
Rail 24.1 45.3 62.1 26.7 S S 37.0 S S 12.8 7.8 13.8
Water – – – – – – – – – – – –
Air (including truck and air) 33.5 S S 44.7 22.7 190.2 46.8 30.4 269.5 10.2 6.7 15.4
Pipeline – S S – S S S S S S S S
Multiple modes 44.6 S S S 41.6 S S 43.7 S 14.0 10.9 17.2
Parcel, USPS or courier 45.6 S S 42.4 46.6 34.4 S S S 14.0 10.9 17.2
Truck and rail S 40.4 S S 23.4 S S 23.6 S 36.1 29.1 43.6
Other multiple modes S S S S S S S S S S 31.6 S
Other and unknown modes S 21.5 S S 44.9 S S 40.2 S 31.3 25.1 426.4

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 14.0 20.3 31.1 14.1 40.7 80.9 34.1 S S 26.8 19.1 11.8
Single modes 14.2 21.2 33.1 14.2 42.5 87.5 34.2 S S 27.9 S S
Truck 22.6 19.4 40.2 19.3 27.4 90.4 24.8 19.4 53.3 22.3 S S
Rail 25.8 S S 31.2 S S 44.6 S S 21.2 22.5 26.2
Water – – – – – – – – – – – –
Air (including truck and air) – S S – S S – S S – 31.6 –
Pipeline – – – – – – S S S S S S
Multiple modes S S S S 31.8 S S 39.1 S 30.8 19.9 37.1
Parcel, USPS or courier – S S – S S – S S – 16.5 –
Truck and rail S S S S S S S S S 31.6 27.9 19.7
Other multiple modes S – S S – S S – S 31.6 – –
Other and unknown modes 47.3 S S S S S S 43.7 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 11.8 27.0 25.2 18.4 35.9 31.2 34.4 31.5 43.9 34.5 S S
Single modes 12.9 27.9 26.3 18.8 37.6 35.4 35.6 32.7 42.7 30.8 S S
Truck 12.1 28.1 25.3 20.0 40.0 37.5 22.0 39.2 33.6 26.6 S S
Rail S 41.8 S S 41.3 S S 42.2 S 28.3 23.5 50.4
Water – – – – – – – – – – – –
Air (including truck and air) – – – – – – – – – – – –
Pipeline – – – – – – S S S S S S
Multiple modes S S S S S S S S S 29.9 26.5 19.7
Parcel, USPS or courier S S S S S S S S S 30.5 26.7 18.7
Truck and rail S S S S S S S S S 31.6 31.6 124.3
Other multiple modes – – – – – – – – – – – –
Other and unknown modes 34.0 S S S S S S S S 28.0 31.5 8.8

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 23.1 18.5 11.6 37.0 49.8 48.5 19.1 17.9 5.9 S S S
Single modes 27.5 27.6 19.8 27.8 49.8 33.2 20.9 18.1 5.9 S S S
Truck 29.7 36.6 27.0 28.3 S S 16.7 45.9 17.7 S S S
Rail 30.8 18.7 7.2 40.3 21.7 8.2 39.8 17.5 5.6 27.6 11.0 20.8
Water – – – – – – – – – – – –
Air (including truck and air) S – S S – S S – S 31.6 – –
Pipeline – – – – – – S S S S S S
Multiple modes S 42.1 S S 39.4 S S 45.2 S 29.2 26.5 15.3
Parcel, USPS or courier S 42.1 S S 39.4 S S 45.2 S 31.6 26.5 15.7
Truck and rail S – S S – S S – S 30.8 – –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes S S S S S S S S S S 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 9.4 44.7 63.6 14.6 S S 14.6 S S 21.8 S S
Single modes 9.4 44.9 64.1 14.6 S S 14.6 S S 20.7 S S
Truck 9.4 S S 14.6 S S 14.6 34.4 647.3 20.7 S S
Rail – – – – – – – – – – – –
Water – – – – – – – – – – – –
Air (including truck and air) – – – – – – – – – – – –
Pipeline – S S – S S S S S S S S
Multiple modes S S S S S S S S S 31.9 40.4 38.1
Parcel, USPS or courier S S S S S S S S S 31.9 40.4 38.1
Truck and rail – – – – – – – – – – – –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes 45.9 47.6 32.4 S 49.8 S S S S 37.5 22.4 210.3

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 14.2 13.9 32.2 33.2 S S 23.9 21.0 66.2 23.3 18.6 12.9
Single modes 18.2 14.1 49.3 38.7 S S 25.9 23.4 71.9 49.0 19.9 93.2
Truck 18.5 13.9 48.5 38.8 S S 26.0 23.4 71.9 38.8 20.0 49.3
Rail – – – – – – – – – – – –
Water – – – – – – – – – – – –
Air (including truck and air) S S S S S S 49.6 S S 26.1 30.2 72.5
Pipeline – – – – – – S S S S S S
Multiple modes 29.2 37.5 30.3 16.2 29.6 19.3 38.7 27.2 46.9 16.1 16.7 12.5
Parcel, USPS or courier 34.4 38.7 31.3 19.2 32.0 16.8 18.4 28.0 13.6 16.2 16.8 12.5
Truck and rail S 42.7 S S 42.7 S S 41.9 S 27.9 26.0 67.2
Other multiple modes S – S S – S S – S S – S
Other and unknown modes S S S S S S S 49.3 S 19.5 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 9.2 15.4 17.9 13.6 20.7 29.1 18.1 26.5 37.9 19.1 27.2 68.5
Single modes 9.3 19.2 20.7 13.9 21.3 30.6 18.4 26.3 40.2 45.4 21.1 39.7
Truck 9.5 19.5 21.3 14.8 21.4 31.1 20.1 26.5 41.1 44.4 20.3 38.6
Rail S 44.5 S S 42.1 S S 47.7 S 25.8 27.0 30.3
Water – – – – – – – – – – – –
Air (including truck and air) S S S 49.0 S S 46.8 S S 23.9 26.7 33.2
Pipeline – – – – – – S S S S S S
Multiple modes S 27.8 S S 49.8 S S 31.1 S 16.2 19.3 45.3
Parcel, USPS or courier S 28.0 S S S S S 32.8 S 16.2 19.3 45.3
Truck and rail – S S – S S – S S – 31.6 –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes 28.8 34.2 36.7 S S S S S S 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 44.7 14.4 83.4 46.0 23.4 77.6 31.2 18.7 38.7 33.5 15.4 50.8
Single modes 45.6 15.5 84.1 47.4 23.8 77.7 31.7 19.6 39.6 34.9 14.2 22.1
Truck 45.6 15.7 85.4 S 20.1 S 27.3 13.6 29.5 33.8 13.8 21.3
Rail S 43.2 S S S S S S S 25.8 38.7 24.8
Water – – – – – – – – – – – –
Air (including truck and air) S S S S S S S S S 24.7 28.1 51.6
Pipeline – – – – – – S S S S S S
Multiple modes 26.8 27.7 46.5 31.3 20.1 31.1 34.7 31.6 22.8 17.5 14.4 43.1
Parcel, USPS or courier 26.8 41.9 83.1 31.3 28.3 80.7 34.7 32.6 131.9 17.5 14.6 43.4
Truck and rail – 42.0 – – 41.5 – – 41.9 – – 25.8 –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes S 31.6 S S 37.6 S 35.1 S S 44.2 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 S 46.1 S 30.9 25.0 58.0 38.2 36.8 63.0 20.7 16.9 31.7
Single modes 22.1 18.0 51.8 16.7 15.9 39.2 16.6 19.7 43.1 22.7 23.5 131.1
Truck 35.9 17.8 59.0 17.8 15.9 39.3 21.3 19.8 43.8 28.2 29.1 160.1
Rail – – – – – – – – – – – –
Water – – – – – – – – – – – –
Air (including truck and air) 34.7 S S 46.9 41.6 492.7 49.1 S S 15.5 12.0 24.2
Pipeline – – – – – – S S S S S S
Multiple modes S S S S S S S S S 14.5 11.4 15.1
Parcel, USPS or courier S S S S S S S S S 14.5 11.4 15.1
Truck and rail – – – – – – – – – – – –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes S 45.7 S S 33.2 S S S S 28.4 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 26.1 14.2 68.5 S 40.7 S S 49.5 S 16.7 15.8 38.1
Single modes 27.1 15.7 73.4 S 38.5 S S S S 37.4 28.0 68.3
Truck 27.1 15.9 72.2 S 39.5 S S S S 45.7 27.9 65.8
Rail S 38.9 S S 41.7 S S 38.4 S 23.8 32.9 120.1
Water – – – – – – – – – – – –
Air (including truck and air) S S S S 48.4 S S S S 18.4 27.5 36.4
Pipeline – – – – – – S S S S S S
Multiple modes 35.4 17.0 81.5 S 14.0 S S 23.8 S 16.8 7.6 21.9
Parcel, USPS or courier 35.4 16.8 81.6 S 12.7 S S 18.9 S 16.8 7.6 22.0
Truck and rail – – – – – – – – – – – –
Other multiple modes S S S S S S S S S 31.6 31.6 –
Other and unknown modes S 24.3 S S S S S S S 33.1 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 49.7 S S S S S S S S 49.7 23.6 21.9
Single modes 49.9 S S S S S S S S 39.7 30.3 26.2
Truck 21.6 S S S S S S S S S 30.3 S
Rail S – S S – S S – S 31.6 – –
Water – – – – – – – – – – – –
Air (including truck and air) S – S S – S S – S 31.6 – –
Pipeline – – – – – – S S S S S S
Multiple modes S S S S S S S S S 36.2 24.8 24.9
Parcel, USPS or courier S S S S S S S S S 36.2 24.8 24.9
Truck and rail – – – – – – – – – – – –
Other multiple modes – – – – – – – – – – – –
Other and unknown modes S S S S S S S S S 31.6 31.6 17.5

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.