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 | 4.8 | – | 13.2 | – | 31.8 | – | 9.5 |
| Single modes | 5.9 | 1.8 | 13.5 | 0.8 | 33.2 | 1.4 | 16.7 |
| Truck | 6.0 | 1.8 | 15.7 | 5.2 | 48.8 | 6.0 | 14.0 |
| Rail | 12.9 | 0.4 | 28.9 | 2.3 | 21.5 | 6.2 | 11.8 |
| All other Single modes | 13.0 | 0.6 | 35.6 | 4.6 | 36.4 | 5.5 | 9.4 |
| Multiple modes | 9.5 | 1.3 | 12.9 | 0.1 | 15.0 | 1.1 | 6.8 |
| Parcel, USPS or courier | 8.3 | 1.1 | 7.1 | – | 12.3 | 0.2 | 6.8 |
| All other multiple modes | 31.4 | 0.4 | 19.3 | 0.1 | 20.0 | 0.9 | 12.3 |
| Other and unknown modes | 23.1 | 0.9 | 25.4 | 0.7 | S | S | 27.8 |
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.