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 | 5.5 | – | 18.7 | – | 16.4 | – | 12.5 |
| Single modes | 5.1 | 1.8 | 19.0 | 2.5 | 16.6 | 0.5 | 16.9 |
| Truck | 5.5 | 1.7 | 17.2 | 3.8 | 8.1 | 8.2 | 28.1 |
| Rail | 20.5 | 0.5 | 36.8 | 2.3 | 33.6 | 8.0 | 10.3 |
| All other Single modes | 25.8 | 0.4 | S | S | 22.5 | – | 11.6 |
| Multiple modes | 13.5 | 1.4 | 23.4 | 0.1 | 27.6 | 0.4 | 8.0 |
| Parcel, USPS or courier | 10.8 | 1.2 | 11.2 | – | 8.8 | 0.2 | 8.0 |
| All other multiple modes | S | S | 37.9 | 0.1 | S | S | S |
| Other and unknown modes | 22.7 | 0.7 | 48.8 | 2.5 | 25.7 | 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.