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 | 4.7 | – | 10.0 | – | 18.7 | – | 8.6 |
| Single modes | 5.5 | 1.3 | 10.1 | 0.6 | 17.4 | 1.6 | 14.0 |
| Truck | 7.2 | 2.8 | 15.0 | 6.3 | 8.8 | 4.9 | 16.1 |
| Rail | 13.6 | 0.5 | 32.4 | 6.1 | 21.6 | 6.4 | 15.2 |
| All other Single modes | 26.1 | 2.8 | 29.8 | 6.4 | 32.1 | 8.5 | 7.6 |
| Multiple modes | 9.0 | 1.3 | S | S | S | S | 7.7 |
| Parcel, USPS or courier | 8.1 | 1.2 | 8.0 | – | 12.2 | 0.1 | 7.7 |
| All other multiple modes | 41.5 | 0.3 | S | S | S | S | 27.6 |
| Other and unknown modes | 34.4 | 0.9 | 27.8 | 0.1 | 31.6 | 0.5 | 30.1 |
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.