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 | 10.3 | – | 13.6 | – | 17.7 | – | 8.2 |
| Single modes | 12.4 | 2.1 | 14.2 | 1.9 | 11.2 | 8.2 | 24.2 |
| Truck | 13.1 | 2.5 | 13.7 | 3.0 | 13.2 | 8.4 | 26.0 |
| Rail | 34.6 | 0.4 | 41.1 | 0.9 | 29.0 | 3.4 | 20.6 |
| All other Single modes | 45.2 | 1.4 | S | S | S | S | 10.9 |
| Multiple modes | 10.9 | 1.8 | 46.5 | 1.9 | S | S | 4.4 |
| Parcel, USPS or courier | 10.8 | 1.5 | 7.9 | – | 12.0 | 0.4 | 4.4 |
| All other multiple modes | 37.2 | 0.7 | S | S | S | S | 23.1 |
| Other and unknown modes | 23.1 | 0.5 | 35.6 | 0.1 | 29.6 | 0.2 | 24.2 |
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.