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 | 5.8 | – | 14.2 | – | 5.1 | – | 12.7 |
| Single modes | 6.4 | 1.6 | 14.3 | 0.3 | 5.3 | 0.3 | 13.3 |
| Truck | 5.7 | 1.6 | 17.9 | 3.9 | 4.3 | 2.9 | 14.6 |
| Rail | 23.9 | 0.6 | 15.2 | 3.7 | 12.4 | 3.3 | 3.8 |
| All other Single modes | 18.3 | 0.5 | S | S | S | S | 5.5 |
| Multiple modes | 9.7 | 1.2 | 9.9 | 0.1 | 10.3 | 0.2 | 8.4 |
| Parcel, USPS or courier | 11.3 | 1.2 | 17.0 | – | 14.5 | 0.2 | 8.3 |
| All other multiple modes | 36.7 | 0.6 | 21.5 | 0.1 | 23.0 | 0.2 | S |
| Other and unknown modes | 17.8 | 0.6 | 32.4 | 0.3 | 23.2 | 0.2 | 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.