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]

Excel | CSV

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 9.9 16.8 22.0 10.6 12.5 13.7 13.9 8.3 23.6 15.9 19.3 18.3
Single modes 11.1 5.8 18.6 10.7 12.9 13.7 14.3 8.3 24.2 22.4 30.4 86.7
Truck 10.3 4.3 15.3 12.8 14.7 15.4 14.5 11.9 29.3 12.5 17.5 26.6
Rail 14.4 7.4 17.9 17.7 30.4 29.9 17.3 8.3 24.9 7.6 4.4 8.9
Water S S S S S S 31.6
Air (including truck and air) 39.1 S S 34.8 S S 40.1 S S 4.0 9.6 13.0
Pipeline S S S S S S S S S S
Multiple modes 14.5 47.0 14.1 37.5 26.9 31.8 28.1 24.0 34.0 13.2 9.7 10.0
Parcel, USPS or courier 16.7 48.5 13.9 19.7 42.0 24.8 18.3 S S 13.2 9.7 10.0
Truck and rail 42.8 33.8 24.7 35.5 37.7 26.3 32.2 32.0 51.3 20.8 44.0 103.5
Other multiple modes S S S S S S S S S S 34.4 S
Other and unknown modes 35.6 22.7 26.7 S 31.3 S S 32.1 S S 41.3 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 32.3 17.2 56.2 31.3 13.7 54.5 30.1 26.8 78.1 37.3 S S
Single modes 32.5 17.3 54.9 29.8 13.6 50.1 30.9 27.1 78.0 32.1 S S
Truck 36.2 18.7 57.1 37.1 13.5 54.9 33.4 28.2 75.8 33.1 S S
Rail 31.9 27.3 96.2 25.1 27.9 59.4 33.2 31.8 90.9 16.1 19.3 27.1
Water S S S S S S 31.6
Air (including truck and air) S S S S S S S S S 21.5 28.0 43.3
Pipeline S S S S S S S S S S
Multiple modes 29.5 S S S S S S S S 27.0 16.1 20.4
Parcel, USPS or courier S S S S S S S S S 23.5 16.3 18.3
Truck and rail 49.7 S S S S S S S S 26.2 31.6 41.2
Other multiple modes S S S S S S 31.6
Other and unknown modes S 41.6 S S 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 15.0 12.6 27.0 25.2 9.3 38.6 31.3 11.1 48.0 S 32.9 S
Single modes 16.8 13.2 29.7 27.8 9.1 41.4 31.3 11.3 48.1 S 32.8 S
Truck 15.9 15.9 31.0 22.7 14.0 35.3 21.1 16.9 38.0 S 35.3 S
Rail 40.8 22.2 66.4 47.6 24.5 87.7 44.9 21.6 73.9 21.0 10.7 21.9
Water
Air (including truck and air)
Pipeline S S S S S S
Multiple modes S S S S S S S S S 25.0 27.5 22.0
Parcel, USPS or courier S S S S 46.8 S S S S 24.9 26.2 25.1
Truck and rail S S S S S S 31.6
Other multiple modes S S S S S S S S S 31.6 31.6
Other and unknown modes S S S S S S S S S 42.8 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 26.2 25.0 18.3 S 39.0 S 33.3 20.6 28.8 S S S
Single modes 14.6 31.2 15.0 S 39.2 S 40.6 22.6 30.0 S S S
Truck 13.8 25.0 14.0 S 46.0 S 39.5 21.0 26.4 S S S
Rail S S S S S S S S S 35.8 S S
Water
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S 49.3 S S S S S S S 28.5 49.9 105.8
Parcel, USPS or courier S S S S S S S S S 29.9 S S
Truck and rail S S S S S S S S S 30.4 26.3 31.8
Other multiple modes
Other and unknown modes S S S S S S S S S 30.4 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 15.8 40.9 73.6 15.3 36.9 60.4 43.8 31.6 173.2 31.3 S S
Single modes 15.9 40.9 73.5 15.3 36.9 60.4 43.8 31.6 173.2 31.5 S S
Truck 15.9 40.9 73.5 15.3 36.9 60.4 43.8 31.6 173.2 33.0 S S
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 S S 48.1 S S S S S 40.5 43.8 66.8
Parcel, USPS or courier S S S S S S S S S 39.4 43.8 68.4
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 48.6 29.1 47.5

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 23.3 13.0 16.3 29.0 20.8 19.9 21.8 21.5 20.6 25.5 14.2 101.7
Single modes 20.4 12.8 14.3 29.2 20.8 19.9 21.9 21.5 20.6 34.0 23.5 54.2
Truck 23.1 14.8 16.1 43.2 22.1 24.5 25.3 27.4 25.9 31.1 17.4 49.9
Rail 17.4 18.7 13.2 30.5 25.5 26.8 26.8 22.4 23.0 10.3 16.5 18.5
Water
Air (including truck and air) S S S S S S S S S S 28.7 S
Pipeline S S S S S S S S S S
Multiple modes S 38.7 S 40.2 29.0 101.7 S 38.4 S 17.2 16.3 68.6
Parcel, USPS or courier S 38.7 S 40.2 29.0 101.7 S 38.4 S 17.2 16.3 68.6
Truck and rail
Other multiple modes
Other and unknown modes S 47.3 S S S S S 39.6 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 31.9 14.7 45.1 16.9 8.5 28.1 19.4 9.4 27.9 17.5 14.6 13.2
Single modes 33.1 6.7 62.5 17.0 8.4 31.0 19.3 10.0 29.1 29.7 23.0 22.8
Truck 39.9 8.6 88.0 19.1 8.9 40.2 14.0 7.1 28.7 24.3 25.1 51.5
Rail 26.4 10.0 29.2 33.0 11.9 40.5 29.4 12.4 34.3 11.1 3.9 11.1
Water
Air (including truck and air) S 30.2 S S 31.1 S S 29.7 S 21.8 7.1 26.9
Pipeline S S S S S S
Multiple modes 29.8 49.8 14.1 S 39.2 S 47.8 36.5 22.9 7.7 9.1 9.7
Parcel, USPS or courier 28.7 S S 47.8 37.4 40.3 S 42.6 S 7.7 8.8 9.5
Truck and rail S 45.4 S S 47.1 S S 49.3 S 31.6 38.4 126.9
Other multiple modes S S S S S S S S S 27.9 28.9 27.2
Other and unknown modes S 29.5 S S 25.8 S S 39.2 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 12.4 15.2 14.1 40.1 19.3 7.8 S 22.3 S 33.4 24.5 29.5
Single modes 16.8 15.0 14.8 40.7 19.6 7.9 S 23.7 S S 43.0 S
Truck 13.6 15.6 12.5 41.9 20.5 7.8 42.4 28.4 18.8 S 48.4 S
Rail S S S S S S S 47.8 S 31.6 49.4 267.1
Water
Air (including truck and air) 42.9 S S 45.4 S S S S S 27.6 27.0 52.5
Pipeline S S S S S S
Multiple modes 41.1 28.4 89.2 36.5 S S 38.7 S S 15.4 21.2 24.8
Parcel, USPS or courier 41.3 28.4 89.1 38.6 S S 41.3 S S 15.4 21.2 24.8
Truck and rail
Other multiple modes S S S S S S 31.6
Other and unknown modes 36.7 S S 30.2 S S S 39.0 S S 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 26.0 S S 31.4 21.2 30.2 27.6 49.2 48.9 16.5 24.6 42.8
Single modes 31.4 36.4 111.1 35.3 19.1 39.1 34.0 24.9 60.5 16.8 29.9 85.7
Truck 27.5 25.0 64.5 36.1 19.4 40.7 36.0 18.3 64.6 41.8 S S
Rail
Water
Air (including truck and air) 40.5 S S 22.2 S S 22.0 S S 3.9 14.4 18.7
Pipeline S S S S S S
Multiple modes 33.1 S S 22.7 S S 22.7 S S 13.5 17.8 14.3
Parcel, USPS or courier 33.2 S S 26.6 S S 24.0 S S 13.4 17.8 14.2
Truck and rail
Other multiple modes S S S S S S 31.6
Other and unknown modes S 45.0 S S 33.0 S 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 14.4 21.2 43.0 37.4 26.3 117.9 32.9 35.9 133.6 31.9 17.9 14.8
Single modes 19.3 17.3 47.5 38.5 25.5 122.5 33.8 36.2 137.3 44.6 S S
Truck 19.8 17.4 48.4 39.8 25.9 122.8 34.4 37.4 138.0 35.3 45.2 33.3
Rail S 24.7 S S 30.4 S S 28.9 S 35.5 18.5 39.5
Water
Air (including truck and air) S S S S S S S S S 23.9 23.4 54.1
Pipeline S S S S S S
Multiple modes 36.7 S S 34.6 36.9 170.9 35.0 47.6 157.4 36.3 12.8 16.1
Parcel, USPS or courier 37.1 S S 41.3 36.9 160.6 42.8 47.6 138.6 36.4 12.8 16.2
Truck and rail S S S S S S 31.6
Other multiple modes
Other and unknown modes 49.2 S S S S S S S S 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 45.4 47.3 8.4 S S S S S S S 32.3 S
Single modes 47.9 49.7 11.5 S S S S S S S S S
Truck 31.3 S S 30.7 43.9 16.2 S S S S S S
Rail S S S S S S S S S 31.6 31.6 18.9
Water
Air (including truck and air) S S S S S S 30.9
Pipeline S S S S S S
Multiple modes 48.5 S S S S S S S S 36.5 28.9 40.9
Parcel, USPS or courier 48.5 S S S S S S S S 36.5 28.9 40.9
Truck and rail
Other multiple modes
Other and unknown modes S S S S S S S S S 31.6 30.9 0.5

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.