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 | 6.2 | – | 7.5 | – | 8.9 | – | 12.2 |
| Single modes | 7.3 | 1.3 | 6.4 | 2.0 | 6.1 | 5.2 | 29.6 |
| Truck | 7.8 | 1.8 | 5.3 | 2.8 | 6.4 | 4.1 | 26.7 |
| Rail | 11.9 | 0.6 | 7.6 | 2.0 | 9.8 | 2.5 | 14.5 |
| All other Single modes | 17.9 | 0.4 | 26.6 | 2.3 | 25.6 | 2.2 | 8.7 |
| Multiple modes | 6.7 | 1.2 | 36.0 | 2.0 | 38.2 | 5.3 | 8.6 |
| Parcel, USPS or courier | 6.4 | 1.2 | 14.1 | – | 11.2 | – | 8.6 |
| All other multiple modes | 25.6 | 0.1 | 37.1 | 2.0 | 39.3 | 5.3 | 40.7 |
| Other and unknown modes | 11.1 | 0.2 | 29.6 | 0.4 | S | S | 27.4 |
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.