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 | 7.5 | – | 19.0 | – | 10.5 | – | 10.0 |
| Single modes | 7.8 | 1.0 | 18.1 | 1.2 | 10.6 | 0.5 | 26.0 |
| Truck | 7.7 | 0.8 | 19.6 | 2.2 | 9.5 | 3.6 | 28.5 |
| Rail | 14.8 | 0.1 | 26.1 | 2.3 | 25.3 | 3.8 | 14.5 |
| All other Single modes | 45.3 | 0.4 | 26.8 | – | 40.9 | – | 10.8 |
| Multiple modes | 10.7 | 0.8 | 13.6 | 0.1 | 17.9 | 0.4 | 8.1 |
| Parcel, USPS or courier | 11.4 | 0.6 | 9.3 | – | 10.0 | – | 8.1 |
| All other multiple modes | S | S | S | S | 37.4 | 0.4 | S |
| Other and unknown modes | 30.6 | 1.1 | S | S | 35.0 | 0.6 | 46.8 |
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.