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 | 6.6 | – | 19.1 | – | 10.2 | – | 14.1 |
| Single modes | 7.0 | 2.4 | 19.2 | 0.1 | 10.2 | 0.2 | 30.3 |
| Truck | 7.8 | 3.3 | 25.3 | 4.5 | 7.8 | 5.6 | 29.0 |
| Rail | 35.0 | 1.0 | 23.9 | 3.8 | 19.5 | 4.0 | 13.7 |
| All other Single modes | 25.8 | 1.2 | 48.9 | 1.6 | S | S | 9.7 |
| Multiple modes | 18.9 | 2.0 | 15.4 | – | 20.9 | 0.2 | 10.9 |
| Parcel, USPS or courier | 19.8 | 1.8 | 12.6 | – | 18.3 | 0.2 | 10.9 |
| All other multiple modes | S | S | 37.4 | – | 44.7 | 0.2 | 42.5 |
| Other and unknown modes | 43.3 | 1.2 | 19.3 | 0.1 | 16.9 | 0.1 | 28.2 |
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.