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 | 6.4 | – | 11.3 | – | 16.7 | – | 7.1 |
| Single modes | 7.7 | 1.6 | 10.6 | 2.1 | 16.0 | 2.7 | 10.4 |
| Truck | 8.6 | 1.7 | 13.0 | 6.5 | 9.7 | 7.1 | 10.6 |
| Rail | 18.1 | 0.7 | 32.0 | 6.5 | 28.6 | 6.8 | 20.2 |
| All other Single modes | 25.2 | 0.7 | 46.4 | 1.9 | 47.4 | 0.6 | 46.5 |
| Multiple modes | 12.4 | 1.5 | 16.8 | 0.1 | 22.8 | 0.5 | 6.2 |
| Parcel, USPS or courier | 12.9 | 1.5 | 14.6 | – | 10.7 | 0.2 | 6.2 |
| All other multiple modes | 42.1 | 0.1 | 39.3 | 0.1 | 36.1 | 0.4 | 31.8 |
| Other and unknown modes | 31.5 | 0.8 | S | S | S | S | 35.0 |
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.