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 | 4.2 | – | 21.5 | – | 11.4 | – | 8.6 |
| Single modes | 4.6 | 1.3 | 22.3 | 1.2 | 12.9 | 2.7 | 12.1 |
| Truck | 4.8 | 1.4 | 27.1 | 3.6 | 5.0 | 3.4 | 11.6 |
| Rail | 11.8 | 0.4 | 28.2 | 2.1 | 21.0 | 4.7 | 9.0 |
| All other Single modes | 14.5 | 0.7 | 22.5 | 2.3 | 32.2 | 2.9 | 6.6 |
| Multiple modes | 10.1 | 1.3 | 31.0 | 0.9 | 26.2 | 2.6 | 7.2 |
| Parcel, USPS or courier | 10.6 | 1.3 | 34.1 | 0.1 | 7.8 | – | 7.3 |
| All other multiple modes | 17.8 | 0.1 | 34.2 | 0.8 | 27.9 | 2.5 | 15.0 |
| Other and unknown modes | 21.5 | 0.7 | 37.4 | 0.7 | 16.3 | 0.2 | 32.2 |
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.