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 | 5.8 | – | 21.8 | – | 18.4 | – | 14.2 |
| Single modes | 7.5 | 3.0 | 17.9 | 5.5 | 20.6 | 4.5 | 27.0 |
| Truck | 7.9 | 3.4 | 20.0 | 6.0 | 11.5 | 8.4 | 19.5 |
| Rail | 14.7 | 0.1 | 44.5 | 4.1 | S | S | 20.6 |
| All other Single modes | S | S | S | S | 44.6 | – | 10.5 |
| Multiple modes | 18.7 | 2.7 | S | S | S | S | 7.2 |
| Parcel, USPS or courier | 18.9 | 2.5 | 14.8 | – | 25.2 | 0.3 | 7.1 |
| All other multiple modes | S | S | S | S | S | S | 25.2 |
| Other and unknown modes | 31.9 | 0.9 | 44.9 | 6.0 | 30.6 | 0.6 | 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.