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 | 10.8 | – | 18.7 | – | 19.5 | – | 10.8 |
| Single modes | 11.5 | 1.7 | 18.8 | 0.5 | 19.7 | 0.4 | 21.7 |
| Truck | 10.1 | 3.1 | 20.7 | 5.3 | 36.3 | 7.8 | 21.2 |
| Rail | S | S | 33.6 | 3.1 | 31.6 | 6.4 | 15.1 |
| All other Single modes | 30.3 | 2.0 | 46.0 | 5.9 | 40.5 | 7.8 | 5.7 |
| Multiple modes | 12.7 | 1.7 | 44.1 | – | 32.1 | 0.2 | 5.6 |
| Parcel, USPS or courier | 12.4 | 1.6 | 10.8 | – | 8.0 | 0.1 | 5.6 |
| All other multiple modes | S | S | S | S | S | S | S |
| Other and unknown modes | 37.8 | 0.3 | 43.5 | 0.5 | 45.4 | 0.4 | 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.