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 | 2.9 | – | 10.5 | – | 6.0 | – | 7.3 |
| Single modes | 3.7 | 1.2 | 10.4 | 0.5 | 4.2 | 2.8 | 10.8 |
| Truck | 4.7 | 1.8 | 13.5 | 3.1 | 4.5 | 1.8 | 10.9 |
| Rail | 15.4 | 0.5 | 12.0 | 1.2 | 8.4 | 2.3 | 4.5 |
| All other Single modes | 9.0 | 0.7 | 26.1 | 2.6 | 36.0 | 1.6 | 2.0 |
| Multiple modes | 7.0 | 1.0 | 21.3 | 0.2 | 35.2 | 2.9 | 4.4 |
| Parcel, USPS or courier | 6.4 | 1.0 | 7.0 | – | 4.2 | – | 4.4 |
| All other multiple modes | 22.5 | 0.4 | 25.7 | 0.2 | 38.3 | 2.9 | 10.1 |
| Other and unknown modes | 14.4 | 0.7 | 28.8 | 0.4 | 15.2 | 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.