Table B-2. Estimated Measures of Reliability for Inbound Shipment Characteristics by Mode of Transportation for CBSA of Destination: 2002
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 | 8.1 | – | 9.5 | – | 17.5 | – | 13.0 |
| Single modes | 9.3 | 1.4 | 9.7 | 2.6 | 16.6 | 1.3 | 17.0 |
| Truck | 10.6 | 3.1 | 11.7 | 4.8 | 21.4 | 5.1 | 14.8 |
| Rail | 18.9 | 0.3 | 15.1 | 0.5 | 19.4 | 4.5 | 12.0 |
| All other Single modes | 19.1 | 1.9 | 21.1 | 3.4 | 28.4 | 1.2 | 5.5 |
| Multiple modes | 9.2 | 1.2 | 9.4 | 0.1 | 10.4 | 0.8 | 12.4 |
| Parcel, USPS or courier | 9.2 | 1.1 | 6.8 | – | 7.9 | 0.4 | 12.4 |
| All other multiple modes | 20.6 | 0.2 | 16.2 | – | 16.4 | 0.6 | 3.7 |
| Other and unknown modes | 20.6 | 0.5 | S | S | S | S | 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.