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 | 12.6 | – | 14.6 | – | 21.3 | – | 15.5 |
| Single modes | 16.4 | 4.9 | 16.7 | 3.4 | 15.1 | 2.8 | 20.7 |
| Truck | 14.5 | 3.6 | 19.4 | 6.6 | 12.2 | 0.2 | 6.3 |
| Rail | – | – | – | – | – | – | – |
| All other Single modes | 24.8 | 3.4 | 19.8 | 6.7 | 17.1 | 2.7 | 5.0 |
| Multiple modes | 24.3 | 4.8 | 26.2 | 3.2 | 26.8 | 5.0 | 3.5 |
| Parcel, USPS or courier | 27.1 | 2.5 | 21.8 | – | 23.7 | 1.2 | 3.6 |
| All other multiple modes | 24.8 | 2.9 | 26.9 | 3.2 | 27.8 | 5.0 | 15.1 |
| Other and unknown modes | 16.5 | 1.3 | 36.6 | 1.6 | 40.2 | 2.9 | 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.