Table B-2. Estimated Measures of Reliability for Inbound Shipment Characteristics by Mode of Transportation for CBSA of Destination: 2002
Monday, July 2, 2012
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 | 20.5 | – | 5.8 | – | 8.0 | – | 8.1 |
| Single modes | 23.7 | 2.9 | 5.9 | 0.4 | 8.8 | 1.2 | 9.1 |
| Truck | 15.5 | 6.4 | 7.6 | 2.7 | 5.0 | 1.5 | 9.3 |
| Rail | 42.0 | 1.6 | 14.7 | 1.1 | 15.3 | 2.7 | 8.8 |
| All other Single modes | S | S | 12.6 | 3.1 | 14.0 | 1.0 | 10.4 |
| Multiple modes | 11.7 | 2.6 | 8.8 | 0.1 | 10.2 | 0.9 | 5.5 |
| Parcel, USPS or courier | 11.0 | 2.1 | 6.5 | – | 8.5 | 0.1 | 5.5 |
| All other multiple modes | 17.3 | 0.5 | 11.2 | 0.1 | 12.6 | 0.9 | 4.5 |
| Other and unknown modes | 18.8 | 0.4 | 11.2 | 0.4 | 32.2 | 0.5 | 43.9 |
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.