Table B-2. Estimated Measures of Reliability for Inbound Shipment Characteristics by Mode of Transportation for CBSA of Destination: 2002
Monday, July 2, 2012
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 | 16.5 | – | 15.3 | – | 27.0 | – | 7.6 |
| Single modes | 26.3 | 4.8 | 20.0 | 6.7 | 26.3 | 7.5 | 17.5 |
| Truck | 14.7 | 2.9 | 19.2 | 6.5 | 15.5 | 1.0 | 13.0 |
| Rail | – | – | – | – | – | – | – |
| All other Single modes | 38.7 | 5.5 | 37.2 | 0.9 | 30.0 | 6.5 | 13.3 |
| Multiple modes | 8.9 | 4.9 | 19.8 | 6.8 | 30.2 | 7.7 | 7.8 |
| Parcel, USPS or courier | 10.2 | 2.0 | 23.0 | – | 44.1 | 0.9 | 7.1 |
| All other multiple modes | 10.4 | 3.3 | 19.9 | 6.8 | 30.6 | 8.1 | 16.1 |
| Other and unknown modes | 29.9 | 0.5 | S | S | 45.7 | 1.3 | 31.0 |
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.