Table B-2. Estimated Measures of Reliability for Inbound Shipment Characteristics by Mode of Transportation for CBSA of Destination: 2002

Table B-2. Estimated Measures of Reliability for Inbound Shipment Characteristics by Mode of Transportation for CBSA of Destination: 2002

[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]

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Mode of transportation Value Tons Ton-miles CV of average miles per shipment
CV Std. error of percent CV Std. error of percent CV Std. error of percent
All modes 8.9 26.0 S S 8.1
Single modes 9.7 2.1 27.6 5.0 S S 17.0
Truck 11.4 3.3 13.4 7.3 9.3 13.6 20.5
Rail S S S S S S 12.7
All other Single modes 32.3 1.5 48.5 1.1 37.3 0.6 6.8
Multiple modes 24.4 2.3 S S S S 3.6
Parcel, USPS or courier 11.8 1.6 12.4 12.1 0.3 3.6
All other multiple modes S S S S S S 22.4
Other and unknown modes 18.6 0.9 27.2 0.8 23.3 0.5 S

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, Metropolitan Data, December 2004.