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 | 5.7 | – | 14.2 | – | 17.4 | – | 7.6 |
| Single modes | 7.1 | 1.5 | 14.6 | 1.6 | 17.8 | 0.7 | 20.8 |
| Truck | 6.9 | 1.6 | 13.6 | 2.8 | 5.8 | 6.4 | 19.8 |
| Rail | 17.2 | 0.2 | 25.9 | 2.7 | 33.2 | 6.3 | 8.6 |
| All other Single modes | 46.0 | 1.3 | 26.6 | 0.5 | 37.9 | 0.5 | 8.9 |
| Multiple modes | 9.8 | 1.6 | 12.9 | 0.1 | 21.0 | 0.2 | 8.4 |
| Parcel, USPS or courier | 10.1 | 1.6 | 9.2 | – | 10.2 | 0.1 | 8.4 |
| All other multiple modes | 43.6 | – | 43.5 | – | 49.3 | 0.2 | S |
| Other and unknown modes | 19.5 | 0.4 | S | S | 46.6 | 0.7 | 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.