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]
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 | 6.1 | – | 34.4 | – | 16.8 | – | 4.5 |
Single modes | 5.1 | 1.9 | 34.8 | 0.9 | 16.8 | 1.8 | 12.8 |
Truck | 5.3 | 1.9 | 35.8 | 3.2 | 13.2 | 4.0 | 14.4 |
Rail | 10.4 | 0.4 | 41.2 | 2.5 | 30.1 | 4.5 | 11.4 |
All other Single modes | 23.2 | 0.5 | S | S | S | S | 11.6 |
Multiple modes | 15.8 | 1.6 | 24.9 | 0.6 | 28.8 | 1.7 | 5.6 |
Parcel, USPS or courier | 20.2 | 1.8 | 10.1 | – | 12.9 | 0.2 | 5.6 |
All other multiple modes | 30.1 | 0.5 | 30.7 | 0.6 | 34.3 | 1.7 | 13.2 |
Other and unknown modes | 47.5 | 1.9 | 44.7 | 0.4 | S | S | 44.1 |
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.