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 | 3.6 | – | 8.8 | – | 8.1 | – | 4.6 |
| Single modes | 4.1 | 1.3 | 10.2 | 2.5 | 5.3 | 6.1 | 18.8 |
| Truck | 4.4 | 1.5 | 11.9 | 3.2 | 2.2 | 3.9 | 20.6 |
| Rail | 9.8 | 0.3 | 10.7 | 1.7 | 12.7 | 4.4 | 9.0 |
| All other Single modes | 30.7 | 0.3 | 39.8 | 0.6 | 41.4 | 0.5 | 8.0 |
| Multiple modes | 5.4 | 0.7 | 47.0 | 2.0 | S | S | 9.8 |
| Parcel, USPS or courier | 5.7 | 0.5 | 6.8 | – | 9.5 | – | 9.9 |
| All other multiple modes | 27.0 | 0.3 | S | S | S | S | 12.1 |
| Other and unknown modes | 30.4 | 1.0 | 24.2 | 0.8 | 27.1 | 0.4 | 24.5 |
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.