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Table B-4a. Estimated Measures of Reliability for Export Shipment Characteristics by Export Mode and Country of Destination: 2002

Table B-4a. Estimated Measures of Reliability for Export Shipment Characteristics by Export Mode and Country of Destination: 2002

[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]

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Total

Export mode of transportation Value Tons
CV 02 Std. error of percent CV 02 Std. error of percent
All modes 4.9 11.8

Canada

Export mode of transportation Value Tons
CV 02 Std. error of percent CV 02 Std. error of percent
All modes 4.5 9.5
Single modes 4.7 1.1 9.0 1.9
Truck 5.9 2.0 5.7 3.0
Rail 13.7 1.1 18.8 4.1
Water 12.6 0.2 18.4 3.5
Air (including truck and air) 13.2 1.0 25.3
Pipeline S S S S
Multiple modes 10.9 1.1 31.3 1.9
Parcel, U.S.P.S. or courier 22.4 1.0 17.2
Truck and rail
All other multiple modes 11.1 0.8 31.7 1.9
Other and unknown modes 21.7 0.6 36.4 1.0

Mexico

Export mode of transportation Value Tons
CV 02 Std. error of percent CV 02 Std. error of percent
All modes 18.0 16.0
Single modes 7.1 7.5 16.5 1.2
Truck 9.8 7.0 13.0 5.2
Rail 12.0 0.9 26.1 4.8
Water 27.4 2.4 28.8 7.4
Air (including truck and air) 23.4 1.3 28.5
Pipeline S S S S
Multiple modes S S 20.4 1.0
Parcel, U.S.P.S. or courier 22.1 0.5 S S
Truck and rail
All other multiple modes S S 20.8 1.0
Other and unknown modes 22.6 0.8 9.2 0.3

All Others

Export mode of transportation Value Tons
CV 02 Std. error of percent CV 02 Std. error of percent
All modes 4.9 15.0
Single modes 5.3 0.8 15.6 1.1
Truck 42.1 1.9 10.4 0.1
Rail 21.8 43.7 1.1
Water 5.8 1.4 16.4 1.9
Air (including truck and air) 7.5 2.1 11.5 0.3
Pipeline S S S S
Multiple modes 6.1 0.7 24.7 1.2
Parcel, U.S.P.S. or courier 10.3 0.6 46.9
Truck and rail
All other multiple modes 8.8 0.4 25.6 1.2
Other and unknown modes 16.1 0.4 36.5 0.6

KEY:
– Represents an estimate 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 on 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: Research and Innovative Technologies Administration, Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Export Data, March 2005.

Updated: Saturday, May 20, 2017