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 | 5.4 | – | 13.8 | – | 12.2 | – | 7.8 |
| Single modes | 5.7 | 2.7 | 14.4 | 0.8 | 11.7 | 2.7 | 14.6 |
| Truck | 6.1 | 3.0 | 14.2 | 2.3 | 10.0 | 4.0 | 17.2 |
| Rail | S | S | 25.2 | 0.5 | 26.7 | 2.4 | 13.2 |
| All other Single modes | 22.4 | 0.6 | 35.0 | 2.0 | 31.1 | 2.0 | 6.4 |
| Multiple modes | 17.2 | 2.7 | 27.6 | 0.4 | 40.0 | 2.4 | 9.7 |
| Parcel, USPS or courier | 17.3 | 2.7 | 15.5 | 0.1 | 13.9 | 0.4 | 9.7 |
| All other multiple modes | 16.5 | – | 41.7 | 0.3 | S | S | 26.9 |
| Other and unknown modes | 38.0 | 1.8 | 26.5 | 0.7 | 34.7 | 1.2 | 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.