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 | 4.0 | – | 20.7 | – | 10.2 | – | 8.7 |
Single modes | 6.2 | 3.1 | 21.2 | 0.7 | 10.4 | 0.8 | 14.9 |
Truck | 6.6 | 3.3 | 27.1 | 4.3 | 5.4 | 3.6 | 15.2 |
Rail | 16.3 | 0.6 | 11.1 | 4.1 | 18.5 | 5.4 | 17.1 |
All other Single modes | 26.7 | 0.3 | 31.6 | 1.3 | 39.6 | 2.4 | 11.1 |
Multiple modes | 15.7 | 1.7 | 47.0 | 0.4 | 39.4 | 0.8 | 6.6 |
Parcel, USPS or courier | 15.8 | 1.7 | 10.4 | – | 8.5 | – | 6.6 |
All other multiple modes | 32.5 | – | S | S | 47.4 | 0.8 | 25.2 |
Other and unknown modes | 34.9 | 2.3 | 23.0 | 0.7 | 28.6 | 0.4 | 42.8 |
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.