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 | 7.3 | – | 11.2 | – | 10.4 | – | 6.6 |
| Single modes | 5.9 | 2.6 | 13.9 | 4.3 | 7.9 | 8.4 | 9.8 |
| Truck | 5.8 | 2.3 | 11.0 | 3.6 | 7.5 | 2.8 | 9.8 |
| Rail | 23.5 | 0.7 | 31.6 | 3.7 | 12.2 | 4.5 | S |
| All other Single modes | 26.6 | 1.2 | 21.6 | 3.4 | 25.4 | 4.8 | 9.5 |
| Multiple modes | 24.1 | 2.6 | 38.7 | 4.5 | 42.7 | 8.4 | 5.8 |
| Parcel, USPS or courier | 24.6 | 2.6 | 7.7 | – | 23.4 | 0.1 | 5.8 |
| All other multiple modes | 28.7 | 0.2 | 39.4 | 4.5 | 43.3 | 8.4 | 10.8 |
| Other and unknown modes | 20.9 | 0.6 | 44.5 | 1.0 | 28.7 | 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.