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 | 9.7 | – | 17.1 | – | 6.9 | – | 18.1 |
| Single modes | 10.8 | 1.8 | 14.5 | 1.7 | 7.1 | 0.8 | 37.5 |
| Truck | 11.2 | 1.9 | 19.6 | 3.1 | 4.3 | 3.9 | 24.9 |
| Rail | 11.5 | 0.4 | 15.6 | 3.9 | 13.7 | 4.0 | 14.2 |
| All other Single modes | 29.1 | 0.5 | 21.9 | – | 18.5 | – | 16.0 |
| Multiple modes | 15.1 | 1.6 | 12.8 | 0.1 | 21.5 | 0.7 | 9.2 |
| Parcel, USPS or courier | 13.8 | 1.4 | 11.2 | – | 12.7 | – | 9.2 |
| All other multiple modes | S | S | 25.5 | 0.1 | 28.8 | 0.7 | 19.7 |
| Other and unknown modes | 27.2 | 0.5 | S | S | 28.1 | 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.