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 14.6 16.0 6.7 9.6
Single modes 15.3 1.2 16.1 0.3 6.8 0.7 13.6
Truck 16.1 2.0 16.9 1.4 7.4 3.5 13.6
Rail 25.9 0.6 21.3 1.3 27.7 3.0 15.3
All other Single modes 40.6 0.9 S S S S 11.1
Multiple modes 9.0 1.2 12.7 0.2 28.5 0.7 5.7
Parcel, USPS or courier 9.3 1.2 12.5 0.1 11.7 0.1 5.7
All other multiple modes 45.9 48.9 S S 26.8
Other and unknown modes 33.7 0.4 37.3 0.2 37.2 0.4 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.