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 3.6 3.4 6.1 12.4 11.1 16.4 7.1 6.6 10.9 9.2 6.4 13.1
Single modes 4.3 4.2 7.6 12.1 11.1 16.1 7.5 4.8 10.5 9.4 5.5 10.1
Truck 4.7 4.3 8.1 12.6 12.5 17.7 9.4 6.5 14.3 9.0 5.9 10.6
Rail 17.3 22.3 23.1 15.7 8.9 18.4 15.1 5.9 15.8 8.6 9.6 15.4
Water S S S S S S 32.1
Air (including truck and air) S 28.7 S 42.6 22.3 48.8 43.2 27.6 63.6 17.9 5.0 25.8
Pipeline 46.2 28.9 14.5 46.7 34.2 1.1 S S S S S S
Multiple modes 13.6 5.4 13.4 27.7 34.0 21.9 16.1 49.6 23.7 7.2 7.4 13.0
Parcel, USPS or courier 14.6 6.5 15.0 11.4 15.6 14.8 11.0 12.3 13.8 7.2 7.4 13.0
Truck and rail 29.4 33.2 21.7 47.6 47.1 26.6 27.9 S S 14.1 12.5 23.4
Other multiple modes 42.7 S S S S S 48.5 S S S 36.5 S
Other and unknown modes 21.4 9.5 26.9 47.2 20.4 81.8 20.0 41.7 21.4 39.6 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 18.5 5.8 29.0 24.0 10.7 27.8 14.8 8.8 25.1 10.1 46.8 313.0
Single modes 18.9 6.0 30.0 24.8 10.5 29.8 15.2 9.2 26.7 35.7 46.8 153.2
Truck 19.2 6.6 31.2 26.0 11.3 31.1 14.2 12.0 27.9 35.6 47.1 154.2
Rail 43.1 33.8 25.8 S 33.6 S S 37.0 S 26.3 14.0 29.2
Water
Air (including truck and air) S S S S S S S S S 31.6 31.6 4.2
Pipeline S S S S S S
Multiple modes 36.4 49.6 374.3 45.4 S S S S S 12.8 31.2 63.1
Parcel, USPS or courier 44.4 39.0 S 39.0 47.4 S 39.2 39.0 S 10.6 48.3 127.0
Truck and rail S S S S S S S S S 31.6 27.6 134.1
Other multiple modes
Other and unknown modes S 40.8 S S S S S 28.2 S 35.4 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 14.7 11.1 24.8 13.4 22.8 28.5 13.0 21.3 33.8 32.0 17.1 70.1
Single modes 14.8 11.2 25.2 13.5 22.8 28.9 13.2 21.3 34.7 36.1 14.2 30.8
Truck 15.2 11.4 26.1 13.8 23.9 30.5 13.9 23.1 39.0 36.3 14.2 30.8
Rail 44.1 45.8 38.9 35.2 44.7 35.5 38.4 46.5 38.1 24.6 24.0 38.0
Water
Air (including truck and air) S S S S S S 30.0
Pipeline S S S S S S
Multiple modes 44.9 43.6 55.7 S S S S 49.5 S 21.9 22.4 36.9
Parcel, USPS or courier 46.2 49.0 89.6 45.2 S S 48.5 S S 21.9 23.9 37.9
Truck and rail S 48.5 S S S S S 47.3 S 31.6 49.8 535.1
Other multiple modes S S S S S S S S S 31.6 31.6 0.4
Other and unknown modes S 34.6 S S 40.4 S S 47.9 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 25.3 11.1 32.3 28.5 25.1 33.4 20.2 10.1 26.5 39.6 33.3 87.1
Single modes 25.5 11.5 33.9 27.0 25.6 31.9 20.2 8.8 28.5 37.7 31.5 89.7
Truck 33.2 16.4 49.6 30.3 29.5 37.5 22.4 11.1 48.1 40.2 33.4 119.2
Rail 15.3 9.9 18.7 27.2 13.7 32.4 27.5 11.7 28.8 11.1 11.8 15.7
Water S S S S S S 31.6
Air (including truck and air) S S S S S S 29.8
Pipeline 45.5 28.9 13.4 42.5 34.2 0.9 S S S S S S
Multiple modes S S S S S S S S S 31.6 21.3 39.1
Parcel, USPS or courier S S 34.0 S S 29.6
Truck and rail S S S S S S S S S 31.6 28.0 39.3
Other multiple modes
Other and unknown modes S 33.7 S S S S S 34.2 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 19.7 37.7 41.1 32.3 42.5 55.9 38.4 41.2 24.9 19.3 13.9 10.0
Single modes 19.7 37.9 41.4 32.3 42.8 56.5 38.4 41.7 25.3 19.4 8.1 9.9
Truck 19.7 38.0 40.9 33.1 42.9 55.1 34.0 42.4 16.9 19.6 8.1 9.8
Rail S 31.0 S S 36.7 S S 36.2 S 28.2 28.9 28.4
Water
Air (including truck and air) S S S S S S 31.6
Pipeline S S S S S S
Multiple modes S 48.9 S S S S S S S 31.6 20.5 1.6
Parcel, USPS or courier S 40.2 S S 42.0 S S S S 31.6 20.2 1.6
Truck and rail S S S S S S 29.9
Other multiple modes
Other and unknown modes S S S S S S S S S 29.8 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 14.3 6.5 21.4 11.8 10.1 13.4 15.0 8.3 17.1 12.7 14.4 17.9
Single modes 15.1 6.6 23.8 12.4 10.5 14.0 15.8 8.0 17.7 19.4 12.1 21.4
Truck 15.7 6.8 25.0 13.5 9.9 13.7 19.6 7.9 21.4 19.6 12.8 22.5
Rail 36.1 11.0 47.9 40.9 21.6 59.4 21.9 13.3 24.5 29.8 19.0 35.6
Water S S S S S S 31.6
Air (including truck and air) S S S S 45.2 S S 48.0 S 22.4 13.1 20.1
Pipeline S S S S S S S S S S
Multiple modes 22.2 14.7 22.2 S 16.7 S 49.4 26.9 45.9 11.1 10.7 13.1
Parcel, USPS or courier 21.7 15.4 22.1 27.0 15.2 35.2 17.3 19.2 22.0 10.9 10.8 12.8
Truck and rail S 38.3 S S 36.0 S S 37.0 S 39.6 16.3 17.9
Other multiple modes S S S S S S S S S 25.8 41.0 109.2
Other and unknown modes S 32.9 S S 49.5 S 49.8 42.6 109.7 24.0 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 12.4 4.7 15.4 9.4 10.6 18.1 8.3 9.6 14.6 9.2 7.7 14.3
Single modes 11.1 4.6 13.6 8.7 10.5 16.9 8.0 9.4 14.2 10.1 3.5 9.2
Truck 11.7 5.0 14.2 9.4 11.5 19.6 10.3 8.9 16.7 10.4 3.3 8.9
Rail 11.1 15.6 17.8 14.0 19.1 19.0 17.7 17.4 22.9 8.6 7.8 12.3
Water S S S S S S 30.7
Air (including truck and air) S 36.6 S S 34.8 S S 29.7 S 22.7 8.2 24.8
Pipeline S S S S S S S S S S
Multiple modes 11.0 15.1 20.9 S 31.5 S 36.1 S S 9.7 7.5 14.6
Parcel, USPS or courier 13.3 9.7 19.8 10.6 13.4 18.1 13.2 29.8 27.6 9.7 7.5 14.6
Truck and rail 43.9 S S S S S 46.4 S S 22.2 18.5 25.5
Other multiple modes S S S S S S S S S 29.5 43.0 136.7
Other and unknown modes S 17.3 S S 20.9 S 44.2 15.1 64.7 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 14.6 7.6 18.3 19.9 23.8 27.2 29.1 12.4 44.1 11.8 13.1 16.5
Single modes 15.8 8.2 21.4 20.1 24.9 29.3 29.6 10.6 52.6 20.9 26.0 33.3
Truck 16.0 8.7 22.2 20.1 23.8 28.5 31.9 8.9 56.5 21.9 26.9 37.0
Rail S 37.5 S S S S 42.6 32.1 76.7 29.7 45.4 61.8
Water S S S S S S 31.6
Air (including truck and air) 33.4 S S 33.0 S S 31.3 S S 16.7 10.1 20.6
Pipeline S S S S S S
Multiple modes 30.1 18.6 26.6 38.6 43.3 15.0 S 21.5 S 14.7 12.4 21.5
Parcel, USPS or courier 31.0 20.0 29.2 36.6 30.8 40.3 37.5 18.4 38.3 14.6 12.4 21.4
Truck and rail S 33.4 S S S S S 33.0 S 28.7 42.3 136.9
Other multiple modes S S S S S S S S S S 31.6 S
Other and unknown modes S 18.9 S 34.5 S S 47.0 S S S 37.0 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 14.3 6.7 14.0 18.3 13.0 23.3 18.6 13.4 17.7 10.3 13.0 21.6
Single modes 17.4 9.3 18.5 19.2 13.5 25.7 20.1 14.1 18.5 22.0 20.2 32.6
Truck 16.9 12.9 19.1 21.6 16.4 34.0 20.2 18.3 23.2 26.1 20.6 42.9
Rail 40.5 35.1 36.0 49.3 14.9 21.2 46.8 17.6 22.4 25.0 6.7 27.9
Water
Air (including truck and air) S 34.3 S S 33.3 S S 40.4 S 8.7 6.4 15.1
Pipeline S S S S S S S S S S
Multiple modes 30.3 13.2 23.6 28.0 16.3 15.4 25.4 13.5 22.0 8.6 9.9 17.8
Parcel, USPS or courier 30.5 13.4 24.1 31.1 18.3 17.9 27.1 12.8 17.5 8.6 9.9 17.7
Truck and rail S 38.7 S S 45.5 S S 40.9 S 29.8 26.0 104.8
Other multiple modes S S S S S S 28.1
Other and unknown modes 25.8 23.3 30.7 26.5 35.2 27.3 34.5 33.1 54.7 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 12.6 17.3 41.3 18.1 13.4 19.8 8.3 18.2 12.9 17.3 9.5 23.5
Single modes 13.7 19.5 46.4 16.2 14.3 19.3 8.5 20.3 14.7 28.9 9.1 28.6
Truck 14.1 19.8 47.1 17.3 15.2 21.2 9.9 21.6 16.6 26.4 9.4 25.2
Rail S 37.9 S S 34.2 S S 24.7 S 28.4 S S
Water
Air (including truck and air) S 28.0 S S 49.5 S 47.3 33.5 20.9 22.0 8.7 50.0
Pipeline S S S S S S
Multiple modes 17.0 29.1 63.0 20.1 S S 33.1 32.2 36.1 11.1 17.8 32.0
Parcel, USPS or courier 16.5 28.8 64.9 15.7 S S 24.1 S S 11.1 17.8 32.0
Truck and rail S 38.4 S S 37.2 S S 35.2 S 31.6 25.0 54.4
Other multiple modes S S S S S S 31.6
Other and unknown modes 29.8 17.2 52.1 S 42.8 S 46.5 39.5 11.4 S 46.5 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 42.1 26.7 36.1 S 43.3 S S 38.1 S 18.9 22.8 40.1
Single modes 43.6 32.2 44.5 S 37.2 S S 34.8 S 29.0 31.3 59.0
Truck 30.8 32.3 27.9 S 37.2 S S 34.8 S 29.2 32.6 62.8
Rail S S S S S S 31.6
Water S S S S S S 31.6
Air (including truck and air) S S S S S S 30.2
Pipeline S S S S S S
Multiple modes S 46.8 S S S S S 48.4 S 26.6 22.1 38.8
Parcel, USPS or courier S S S S S S 42.3 S S 27.8 23.9 41.1
Truck and rail S S S S S S S S S 31.6 43.0 47.8
Other multiple modes
Other and unknown modes S S S S S S 31.9

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.