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 | 7.7 | – | 15.1 | – | 20.9 | – | 12.1 |
| Single modes | 7.2 | 1.6 | 15.2 | 0.5 | 20.9 | 0.2 | 21.1 |
| Truck | 7.3 | 1.5 | 16.2 | 3.4 | 19.1 | 6.3 | 10.8 |
| Rail | 18.5 | 0.6 | 20.9 | 3.7 | 31.0 | 7.1 | 16.1 |
| All other Single modes | 21.3 | 0.5 | 30.9 | 1.9 | 29.9 | 2.2 | 14.2 |
| Multiple modes | 9.7 | 0.6 | 24.6 | – | 36.0 | 0.2 | 8.8 |
| Parcel, USPS or courier | 9.9 | 0.6 | 31.3 | – | 12.6 | – | 8.8 |
| All other multiple modes | 24.1 | – | 40.3 | – | 45.3 | 0.2 | 15.7 |
| Other and unknown modes | 27.9 | 1.3 | 43.2 | 0.5 | 19.0 | – | 32.8 |
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.