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 | 8.2 | – | 10.6 | – | 7.5 | – | 6.2 |
| Single modes | 8.9 | 0.8 | 11.0 | 1.1 | 7.7 | 0.6 | 12.8 |
| Truck | 10.1 | 2.4 | 10.1 | 3.9 | 3.5 | 2.7 | 13.1 |
| Rail | 5.2 | 0.4 | 9.3 | 2.6 | 13.4 | 3.2 | 6.1 |
| All other Single modes | 33.3 | 2.3 | 39.6 | 4.2 | 27.4 | 1.4 | 5.3 |
| Multiple modes | 5.9 | 0.7 | 26.4 | 0.2 | 24.1 | 0.6 | 3.3 |
| Parcel, USPS or courier | 7.2 | 0.8 | 8.7 | – | 7.9 | – | 3.3 |
| All other multiple modes | 19.8 | 0.3 | 30.3 | 0.2 | 27.8 | 0.6 | 22.4 |
| Other and unknown modes | 15.0 | 0.3 | 32.5 | 1.2 | 21.0 | 0.2 | 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.