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 | 11.5 | – | 15.2 | – | 10.0 | – | 13.1 |
| Single modes | 13.2 | 2.0 | 15.3 | 0.4 | 9.7 | 0.5 | 28.6 |
| Truck | 15.0 | 3.6 | 16.9 | 5.3 | 13.7 | 6.3 | 22.8 |
| Rail | 30.7 | 0.7 | 23.8 | 2.8 | 22.7 | 5.5 | 14.8 |
| All other Single modes | 39.2 | 3.0 | 48.1 | 5.7 | 47.9 | 6.3 | 15.1 |
| Multiple modes | 7.9 | 1.9 | 29.3 | – | 10.0 | 0.2 | 9.1 |
| Parcel, USPS or courier | 7.9 | 1.9 | 11.4 | – | 5.1 | 0.2 | 9.1 |
| All other multiple modes | 42.3 | – | S | S | 48.4 | 0.1 | 39.3 |
| Other and unknown modes | 22.7 | 0.4 | 40.2 | 0.4 | S | S | 28.2 |
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.