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 | 4.9 | – | 12.9 | – | 11.7 | – | 6.0 |
| Single modes | 4.9 | 1.9 | 13.0 | 1.1 | 11.2 | 4.4 | 10.5 |
| Truck | 4.2 | 2.2 | 14.8 | 4.1 | 3.6 | 6.5 | 11.9 |
| Rail | 27.5 | 0.4 | 25.4 | 1.6 | 26.7 | 3.3 | 8.1 |
| All other Single modes | 30.7 | 1.8 | 30.7 | 2.0 | 28.5 | 4.0 | 4.8 |
| Multiple modes | 14.2 | 2.1 | 41.9 | 0.9 | 44.2 | 3.7 | 2.8 |
| Parcel, USPS or courier | 10.3 | 1.5 | 9.2 | 0.1 | 12.9 | 0.3 | 2.9 |
| All other multiple modes | S | S | S | S | S | S | 7.2 |
| Other and unknown modes | 32.1 | 0.6 | 23.8 | 1.0 | S | S | 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.