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 | 7.7 | – | 26.4 | – | 17.0 | – | 13.5 |
| Single modes | 9.2 | 2.2 | 26.8 | 1.6 | 19.0 | 5.0 | 17.4 |
| Truck | 10.5 | 4.1 | 47.5 | 9.6 | 28.3 | 9.9 | 19.4 |
| Rail | 19.0 | 2.0 | 28.0 | 8.0 | 28.7 | 11.2 | 33.4 |
| All other Single modes | 49.8 | 3.0 | S | S | S | S | 16.9 |
| Multiple modes | 21.3 | 2.0 | S | S | S | S | 10.7 |
| Parcel, USPS or courier | 21.2 | 1.9 | 19.1 | – | 20.5 | – | 10.7 |
| All other multiple modes | S | S | S | S | S | S | 27.8 |
| Other and unknown modes | 29.0 | 0.5 | S | S | S | S | 20.6 |
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.