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 | 7.1 | – | 8.7 | – | 10.7 | – | 8.5 |
| Single modes | 7.5 | 0.7 | 9.2 | 1.5 | 12.3 | 2.9 | 8.4 |
| Truck | 8.1 | 1.3 | 8.1 | 2.9 | 4.9 | 3.9 | 9.1 |
| Rail | 9.9 | 0.3 | 17.9 | 3.1 | 25.5 | 5.5 | 8.9 |
| All other Single modes | 19.5 | 0.7 | 37.9 | 2.4 | 18.2 | 1.1 | 9.1 |
| Multiple modes | 8.6 | 0.7 | 28.0 | 1.2 | 32.0 | 2.9 | 4.7 |
| Parcel, USPS or courier | 6.9 | 0.6 | 10.5 | – | 7.5 | – | 4.7 |
| All other multiple modes | 41.8 | 0.3 | 29.7 | 1.2 | 33.5 | 2.9 | 15.9 |
| Other and unknown modes | 25.3 | 0.7 | 33.5 | 1.0 | 16.4 | 0.3 | 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.