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 | 18.5 | – | 17.7 | – | 11.1 | – | 8.8 |
| Single modes | 20.3 | 2.5 | 18.0 | 0.6 | 11.7 | 2.3 | 9.1 |
| Truck | 21.5 | 2.9 | 22.3 | 5.9 | 11.8 | 5.8 | 8.6 |
| Rail | 21.2 | 1.0 | 23.1 | 5.7 | 22.1 | 6.2 | 14.7 |
| All other Single modes | 30.0 | 0.3 | S | S | 30.0 | – | 12.9 |
| Multiple modes | 19.9 | 1.7 | S | S | S | S | 9.6 |
| Parcel, USPS or courier | 21.1 | 1.8 | 14.5 | – | 12.3 | 0.1 | 9.6 |
| All other multiple modes | S | S | S | S | S | S | 32.3 |
| Other and unknown modes | 34.0 | 1.4 | 34.2 | 0.2 | 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.