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 | 9.0 | – | 13.5 | – | 17.0 | – | 30.3 |
| Single modes | 11.3 | 4.8 | 15.1 | 3.5 | 17.5 | 0.6 | 38.8 |
| Truck | 12.0 | 4.9 | 16.9 | 4.2 | 20.6 | 5.3 | 40.0 |
| Rail | 17.5 | 0.4 | 23.8 | 3.1 | 26.9 | 5.7 | 8.2 |
| All other Single modes | 40.2 | 1.0 | S | S | S | S | 33.0 |
| Multiple modes | 13.5 | 1.5 | 26.6 | 0.2 | 17.4 | 0.2 | 21.4 |
| Parcel, USPS or courier | 14.8 | 1.5 | 9.3 | – | 8.3 | – | 21.4 |
| All other multiple modes | S | S | 43.6 | 0.2 | 30.1 | 0.2 | S |
| Other and unknown modes | 37.5 | 5.6 | 34.9 | 3.5 | 25.7 | 0.5 | 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.