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 | 8.5 | – | 15.3 | – | 10.7 | – | 8.3 |
Single modes | 9.3 | 2.4 | 15.5 | 0.5 | 11.1 | 0.9 | 17.8 |
Truck | 12.0 | 3.5 | 16.5 | 3.8 | 6.7 | 5.7 | 23.0 |
Rail | 30.7 | 1.8 | 24.6 | 2.0 | 31.8 | 6.0 | 19.6 |
All other Single modes | 25.2 | 1.6 | 24.2 | 2.9 | 31.3 | – | 8.8 |
Multiple modes | 17.3 | 2.3 | 38.1 | 0.4 | 36.7 | 0.9 | 3.9 |
Parcel, USPS or courier | 18.9 | 2.2 | 6.5 | – | 10.8 | – | 3.9 |
All other multiple modes | S | S | S | S | S | S | 41.3 |
Other and unknown modes | 29.5 | 0.9 | 26.3 | 0.4 | 24.3 | 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.