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 | 12.8 | – | 25.1 | – | 13.5 | – | 9.0 |
| Single modes | 14.7 | 3.5 | 25.5 | 0.6 | 14.3 | 1.4 | 25.3 |
| Truck | 16.6 | 3.8 | 35.9 | 6.7 | 9.3 | 2.6 | 15.1 |
| Rail | 11.3 | 0.4 | 13.0 | 2.9 | 17.5 | 4.0 | 11.5 |
| All other Single modes | 18.3 | 1.5 | S | S | 34.0 | 4.6 | 8.0 |
| Multiple modes | 14.8 | 1.3 | 17.2 | 0.2 | 21.1 | 0.8 | 5.1 |
| Parcel, USPS or courier | 16.0 | 1.4 | 9.0 | – | 9.9 | 0.1 | 5.1 |
| All other multiple modes | 30.5 | 0.4 | 23.6 | 0.2 | 27.4 | 0.7 | 15.9 |
| Other and unknown modes | 45.4 | 2.3 | 49.1 | 0.6 | 41.1 | 0.8 | 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.