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 | 8.8 | – | 24.8 | – | S | S | 10.3 |
| Single modes | 10.6 | 1.8 | 24.9 | 0.4 | S | S | 23.2 |
| Truck | 12.5 | 3.9 | 25.8 | 8.0 | 14.2 | 17.6 | 25.7 |
| Rail | 30.2 | 0.2 | S | S | S | S | 14.3 |
| All other Single modes | 30.6 | 3.2 | 22.6 | – | 19.5 | 0.2 | 6.0 |
| Multiple modes | 9.1 | 1.7 | 13.6 | – | 12.9 | 0.7 | 4.3 |
| Parcel, USPS or courier | 9.2 | 1.6 | 10.8 | – | 11.2 | 0.6 | 4.3 |
| All other multiple modes | S | S | S | S | S | S | 34.3 |
| Other and unknown modes | 20.1 | 0.3 | 30.1 | 0.3 | 34.7 | 0.9 | 18.2 |
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.