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 | 10.0 | – | 12.9 | – | 18.7 | – | 7.9 |
| Single modes | 11.5 | 2.7 | 13.0 | 0.3 | 19.0 | 0.8 | 25.0 |
| Truck | 12.5 | 3.1 | 14.0 | 6.3 | 15.7 | 4.6 | 14.9 |
| Rail | 15.8 | 1.2 | 17.0 | 6.6 | 22.6 | 5.1 | 7.6 |
| All other Single modes | 29.5 | 0.3 | S | S | S | S | 10.2 |
| Multiple modes | 18.0 | 2.8 | 28.3 | 0.2 | 20.1 | 0.5 | 5.9 |
| Parcel, USPS or courier | 18.7 | 2.8 | 14.0 | 0.1 | 14.5 | 0.2 | 5.9 |
| All other multiple modes | S | S | 46.6 | 0.2 | 34.1 | 0.3 | 20.2 |
| Other and unknown modes | 21.9 | 0.5 | 30.3 | 0.2 | 48.2 | 0.4 | 22.3 |
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.