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 | 3.2 | – | 12.4 | – | 8.8 | – | 6.5 |
| Single modes | 3.9 | 1.4 | 12.9 | 1.6 | 8.5 | 3.6 | 10.4 |
| Truck | 4.6 | 2.1 | 17.5 | 4.2 | 8.8 | 4.4 | 8.8 |
| Rail | 16.3 | 0.7 | 17.4 | 3.2 | 16.7 | 4.7 | 4.7 |
| All other Single modes | 22.0 | 0.2 | S | S | S | S | 8.8 |
| Multiple modes | 11.8 | 1.4 | 46.9 | 1.6 | 42.8 | 3.5 | 9.1 |
| Parcel, USPS or courier | 12.1 | 1.3 | 9.7 | – | 10.0 | – | 9.1 |
| All other multiple modes | 25.0 | 0.1 | 49.9 | 1.6 | 44.4 | 3.5 | S |
| Other and unknown modes | 18.9 | 0.6 | 25.7 | 0.2 | 40.4 | 0.3 | 27.4 |
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.