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 | – | 8.0 | – | 8.8 | – | 10.3 |
| Single modes | 4.7 | 2.7 | 8.6 | 1.6 | 9.9 | 2.6 | 15.1 |
| Truck | 5.1 | 2.9 | 10.3 | 2.7 | 8.2 | 3.3 | 17.8 |
| Rail | 14.5 | 0.6 | 15.8 | 2.7 | 17.0 | 4.5 | 6.0 |
| All other Single modes | 18.5 | 0.6 | 29.8 | 0.8 | 41.9 | 3.0 | 9.4 |
| Multiple modes | 8.3 | 1.0 | 46.5 | 0.8 | S | S | 7.8 |
| Parcel, USPS or courier | 10.5 | 1.1 | 8.6 | – | 10.0 | – | 7.8 |
| Single modes | 37.8 | 0.3 | S | S | S | S | 16.2 |
| Other and unknown modes | 43.2 | 2.7 | 46.3 | 1.7 | 30.3 | 0.6 | 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.