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 | 5.7 | – | 19.5 | – | 13.6 | – | 4.6 |
| Single modes | 5.6 | 2.0 | 19.7 | 1.7 | 9.1 | 2.9 | 4.8 |
| Truck | 6.0 | 2.4 | 21.7 | 4.0 | 9.6 | 5.5 | 6.9 |
| Rail | 21.2 | 0.3 | 23.5 | 1.2 | 23.0 | 3.0 | 11.1 |
| All other Single modes | 27.4 | 0.9 | 41.3 | 3.7 | 33.4 | 3.7 | 13.9 |
| Multiple modes | 17.9 | 1.7 | S | S | S | S | 3.8 |
| Parcel, USPS or courier | 19.2 | 1.6 | 16.3 | – | 17.1 | 0.1 | 3.8 |
| All other multiple modes | S | S | S | S | S | S | 25.0 |
| Other and unknown modes | 23.3 | 0.6 | 33.7 | 0.4 | 42.4 | 0.9 | 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.