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 | 6.3 | – | 11.5 | – | 8.7 | – | 4.5 |
| Single modes | 7.2 | 1.6 | 11.3 | 0.4 | 8.7 | 1.3 | 9.4 |
| Truck | 6.1 | 1.8 | 18.5 | 5.5 | 6.7 | 2.8 | 13.2 |
| Rail | 10.5 | 0.8 | 16.4 | 2.4 | 17.3 | 4.7 | 10.2 |
| All other Single modes | 14.6 | 2.2 | 15.5 | 4.4 | 15.4 | 3.5 | 9.0 |
| Multiple modes | 6.1 | 0.7 | 48.0 | 0.3 | 36.2 | 1.3 | 5.6 |
| Parcel, USPS or courier | 7.0 | 0.6 | 11.9 | – | 10.2 | – | 5.6 |
| All other multiple modes | 20.8 | 0.3 | S | S | 39.1 | 1.3 | 8.3 |
| Other and unknown modes | 35.5 | 1.4 | 30.3 | 0.3 | 26.5 | 0.3 | 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.