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 9.2 5.8 13.4 14.7 10.6 19.5 S 18.3 S 46.8 20.3 65.6
Single modes 12.9 6.2 18.3 12.0 11.4 15.8 21.7 30.8 30.7 28.2 42.1 31.7
Truck 11.3 6.2 15.0 8.4 16.5 17.9 5.9 14.2 12.8 12.6 5.1 17.9
Rail
Water S 32.5 S 38.1 S S 48.7 S S 18.8 21.8 57.9
Air (including truck and air) 27.4 15.2 32.0 32.8 22.3 12.1 20.4 33.3 11.9 24.3 19.0 15.1
Pipeline 23.0 19.7 33.3 21.1 19.3 27.6 S S S S S S
Multiple modes 12.4 13.5 21.1 38.8 36.5 150.6 S 32.1 S 21.6 13.4 51.3
Parcel, USPS or courier 27.0 15.3 46.6 17.2 17.6 49.3 31.6 19.2 88.2 18.4 14.1 52.8
Truck and rail
Other multiple modes 11.5 18.9 22.2 39.0 36.8 152.0 S 32.2 S 28.1 20.4 76.6
Other and unknown modes 22.7 17.6 23.7 34.4 36.4 38.6 36.0 32.2 10.6 S 16.2 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 35.5 14.0 29.6 S 25.4 S S S S 47.0 S S
Single modes 37.3 14.0 26.2 43.7 25.6 57.7 S 32.3 S S S S
Truck 40.2 16.6 29.5 46.2 27.8 64.6 46.4 31.4 65.7 24.6 12.0 42.3
Rail
Water S S S S S S S S S S 28.2 S
Air (including truck and air) S 39.0 S S 42.3 S S 48.5 S 32.7 24.4 17.4
Pipeline S S S S S S
Multiple modes 44.5 32.8 131.9 S S S S S S 38.0 24.5 148.7
Parcel, USPS or courier S S S S S S S S S 43.4 29.8 178.6
Truck and rail
Other multiple modes 46.1 32.3 132.9 S S S S S S 39.1 S S
Other and unknown modes S 33.2 S S 48.6 S S 37.5 S S 37.9 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 13.5 11.1 14.8 19.1 15.9 19.8 34.3 36.6 45.9 S 35.5 S
Single modes 15.2 14.7 19.9 23.9 19.6 29.4 27.0 S S 9.0 17.4 23.3
Truck 17.3 19.0 23.5 23.4 23.8 31.8 21.3 29.9 47.3 6.3 5.4 9.4
Rail
Water 24.0 S S 36.9 S S 35.2 S S S 27.0 S
Air (including truck and air) S S S S 31.4 S S S S S S S
Pipeline S S S S S S
Multiple modes 36.9 23.7 23.2 35.4 31.4 19.0 38.5 46.6 60.7 S 26.7 S
Parcel, USPS or courier S S S S S S S S S S 29.2 S
Truck and rail
Other multiple modes 37.4 23.9 22.5 35.4 31.5 19.0 38.5 46.6 60.7 S 30.7 S
Other and unknown modes 49.8 26.8 59.6 S 29.7 S S 44.3 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 13.5 24.2 29.6 12.6 26.0 27.8 38.5 26.2 256.8 S 34.2 S
Single modes 15.7 23.7 23.7 17.3 25.5 23.7 S 26.8 S 6.4 36.2 24.8
Truck 15.7 23.7 23.7 17.3 25.5 23.7 S 26.8 S 6.4 36.2 24.8
Rail
Water S S S S S S 31.6
Air (including truck and air)
Pipeline S S S S S S
Multiple modes 47.5 S S 43.2 S S S S S 21.5 S S
Parcel, USPS or courier S S S S S S 31.6
Truck and rail
Other multiple modes 46.8 S S 43.2 S S S S S 21.5 S S
Other and unknown modes S S S S S S S S S 25.9 30.5 8.2

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 28.1 18.9 34.2 23.1 17.3 28.5 35.4 35.8 77.4 S 25.5 S
Single modes 29.0 20.3 34.8 22.8 17.4 27.0 37.8 49.4 37.4 40.5 12.7 24.5
Truck 39.9 29.4 45.2 33.6 26.0 41.4 12.7 25.6 19.9 49.2 12.3 27.2
Rail
Water S S S S S S S S S 27.9 28.3 52.8
Air (including truck and air) S S S S S S 31.6
Pipeline 23.0 19.7 33.4 21.1 19.3 27.7 S S S S S S
Multiple modes 35.8 S S 37.8 S S 39.6 S S 24.6 21.3 301.2
Parcel, USPS or courier
Truck and rail
Other multiple modes 35.8 S S 37.8 S S 39.6 S S 24.6 21.3 301.2
Other and unknown modes S S S S S 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 20.1 12.2 35.7 19.6 15.6 32.3 39.1 28.8 52.8 36.8 S S
Single modes 17.8 17.6 44.5 23.2 22.3 47.2 23.4 30.4 55.1 37.1 S S
Truck 17.7 18.6 42.9 24.1 21.8 52.9 25.4 24.8 62.1 19.7 5.8 34.6
Rail
Water 24.0 17.0 41.7 34.2 36.8 79.2 34.6 S S 24.9 16.4 128.1
Air (including truck and air) 45.7 43.9 275.2 31.3 S S S S S 32.6 25.6 37.5
Pipeline S S S S S S S S S S
Multiple modes 43.1 25.6 56.1 30.6 33.9 22.2 33.6 36.9 27.8 42.6 8.2 184.3
Parcel, USPS or courier 48.5 40.2 207.9 35.1 34.5 111.5 29.3 48.2 196.0 36.4 15.6 289.5
Truck and rail
Other multiple modes 27.3 41.9 9.3 37.0 36.9 19.9 42.4 38.6 27.0 22.2 13.9 29.9
Other and unknown modes S 29.9 S 43.6 20.8 231.9 S 33.0 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 12.5 9.8 17.6 19.2 17.2 19.3 27.4 14.5 59.1 29.3 38.1 360.2
Single modes 12.3 13.0 19.0 21.6 17.0 21.2 41.1 21.6 97.0 39.6 S S
Truck 12.1 12.6 18.1 22.4 17.1 21.2 31.6 17.1 27.5 8.1 8.4 9.7
Rail
Water S 36.8 S 32.8 49.0 481.9 S 41.9 S 24.9 23.3 131.1
Air (including truck and air) 36.4 27.0 29.4 31.0 25.9 34.9 40.1 S S 26.7 19.9 24.1
Pipeline S S S S S S
Multiple modes 23.3 20.6 39.2 23.1 22.8 46.0 22.5 22.6 63.8 21.8 S S
Parcel, USPS or courier 31.7 38.3 77.9 39.4 36.8 118.1 S 27.5 S 21.0 S S
Truck and rail
Other multiple modes 15.7 21.3 21.2 35.5 29.6 58.5 23.6 27.6 49.5 20.5 5.6 83.7
Other and unknown modes 30.1 21.7 48.4 39.2 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 12.1 13.8 21.8 7.3 20.0 27.8 40.4 32.0 191.4 34.3 22.6 147.2
Single modes 13.2 13.8 22.6 6.1 20.7 25.2 10.2 18.9 27.8 28.0 47.6 211.7
Truck 10.5 13.8 18.6 6.1 20.7 25.3 8.3 19.9 25.3 10.2 8.6 18.3
Rail
Water 36.9 39.6 43.5 42.0 44.9 43.2 S 42.1 S 27.3 21.7 197.3
Air (including truck and air) S 24.1 S S 27.9 S S 44.8 S S 46.4 S
Pipeline S S S S S S
Multiple modes 27.2 33.4 77.3 S 31.0 S S 30.3 S 37.4 34.9 82.0
Parcel, USPS or courier 30.3 34.7 43.7 28.0 39.7 48.4 S 42.0 S 38.7 35.6 95.7
Truck and rail
Other multiple modes 28.4 47.0 118.3 S 31.8 S S 31.8 S 43.3 10.7 64.1
Other and unknown modes 31.8 28.1 35.6 49.3 S S S S S S 24.6 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 39.9 16.2 76.1 45.9 26.3 107.7 S 25.9 S 26.5 31.7 25.4
Single modes 47.5 17.4 125.8 S 26.0 S S 24.0 S 43.3 36.3 24.3
Truck 23.2 18.7 40.5 22.3 27.2 38.7 24.4 30.4 50.2 10.2 9.6 22.5
Rail
Water S 45.2 S S S S S 44.9 S 21.9 26.4 25.3
Air (including truck and air) S 30.3 S 42.1 35.2 49.8 S 23.0 S 18.7 26.8 8.4
Pipeline S S S S S S
Multiple modes 32.3 15.3 35.8 44.1 19.0 172.8 31.9 28.2 84.7 48.4 26.9 37.4
Parcel, USPS or courier 44.6 15.8 28.0 S 20.0 S S 28.2 S S 30.8 S
Truck and rail
Other multiple modes 26.3 46.0 631.3 38.0 37.5 S 24.6 42.4 S S 23.2 S
Other and unknown modes 44.9 33.1 20.9 S 42.6 S S S S 24.5 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 34.3 8.0 110.4 47.5 28.4 316.2 S S S 30.6 37.4 41.1
Single modes 40.7 12.1 178.6 37.7 33.8 201.1 S 20.6 S S S S
Truck 33.5 12.6 126.1 36.5 34.4 184.8 46.3 28.9 350.9 16.0 8.1 32.5
Rail
Water S 43.6 S S 39.0 S S 44.2 S 17.4 23.2 30.3
Air (including truck and air) S 36.4 S S S S S S S 24.2 46.5 219.4
Pipeline S S S S S S
Multiple modes 23.4 19.7 47.5 S S S S S S 39.1 19.3 26.6
Parcel, USPS or courier 22.5 18.8 21.7 27.4 40.7 95.0 S S S S 19.1 S
Truck and rail
Other multiple modes 40.5 S S S S S S S S 10.2 S S
Other and unknown modes 35.7 25.6 39.7 48.0 24.7 239.3 S 29.6 S S 40.7 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 43.9 S S S S 44.5 S S S 35.0 S
Single modes S 39.9 S S S S 49.5 S S S S S
Truck S 47.9 S S S S 49.8 S S S 30.6 S
Rail
Water
Air (including truck and air) S S S S S S S S S 29.8 31.6 2.4
Pipeline S S S S S S
Multiple modes S S S S S S S S S 32.4 31.6 159.5
Parcel, USPS or courier S S S S S S S S S 32.4 31.6 35.7
Truck and rail
Other multiple modes S S S S S S S S S 31.6 31.6 31.9
Other and unknown modes S S S S S S S S S 31.6 31.5 0.2

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.