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 | 7.5 | – | 20.0 | – | 17.9 | – | 10.5 |
| Single modes | 11.5 | 5.9 | 20.7 | 1.8 | 19.2 | 3.7 | 29.0 |
| Truck | 14.1 | 5.7 | 15.1 | 5.7 | 19.1 | 3.6 | 38.4 |
| Rail | S | S | S | S | S | S | S |
| All other Single modes | 21.1 | 2.4 | S | S | 47.6 | 1.6 | 11.8 |
| Multiple modes | 27.0 | 5.9 | 21.1 | 0.5 | S | S | 8.9 |
| Parcel, USPS or courier | 27.1 | 5.9 | 18.5 | 0.5 | 16.7 | 1.4 | 8.7 |
| All other multiple modes | S | S | S | S | S | S | 27.9 |
| Other and unknown modes | 35.1 | 0.8 | 40.9 | 1.4 | S | S | 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.