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 | 6.0 | – | 15.3 | – | 14.2 | – | 8.4 |
| Single modes | 6.6 | 1.1 | 7.5 | 7.2 | 16.8 | 2.3 | 16.2 |
| Truck | 7.3 | 1.6 | 6.7 | 6.2 | 12.1 | 4.9 | 15.8 |
| Rail | 10.8 | 0.3 | 14.5 | 1.9 | 19.0 | 4.0 | 8.6 |
| All other Single modes | 13.0 | 0.6 | 40.5 | 2.7 | 42.7 | 5.0 | 12.8 |
| Multiple modes | 9.5 | 1.1 | 29.8 | 0.7 | 29.1 | 2.6 | 3.9 |
| Parcel, USPS or courier | 9.6 | 1.0 | 6.9 | – | 13.6 | – | 3.8 |
| All other multiple modes | S | S | 33.5 | 0.6 | 31.0 | 2.6 | S |
| Other and unknown modes | 17.4 | 0.2 | S | S | 38.7 | 2.0 | 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.