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 | 7.0 | – | 10.9 | – | 5.4 | – | 6.1 |
| Single modes | 8.7 | 2.2 | 11.1 | 1.1 | 5.6 | 4.8 | 9.7 |
| Truck | 9.2 | 2.5 | 15.3 | 3.6 | 6.3 | 4.5 | 10.7 |
| Rail | 19.2 | 0.6 | 12.7 | 2.8 | 18.2 | 6.3 | 9.4 |
| All other Single modes | 23.0 | 0.3 | 19.3 | 1.5 | 30.4 | 0.7 | 8.2 |
| Multiple modes | 12.6 | 2.1 | 31.0 | 1.1 | 41.9 | 5.0 | 5.0 |
| Parcel, USPS or courier | 12.7 | 2.0 | 7.3 | – | 5.9 | – | 5.0 |
| All other multiple modes | 26.2 | 0.1 | 33.5 | 1.1 | 43.7 | 5.0 | 17.3 |
| Other and unknown modes | 16.5 | 0.2 | 37.9 | 0.6 | S | S | 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.