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 | 11.5 | – | 18.2 | – | 14.7 | – | 7.7 |
| Single modes | 14.1 | 3.0 | 18.5 | 0.4 | 15.5 | 1.6 | 8.0 |
| Truck | 15.0 | 3.5 | 21.1 | 4.7 | 12.7 | 5.7 | 7.6 |
| Rail | 22.9 | 0.8 | 31.9 | 4.7 | 32.4 | 6.2 | 9.5 |
| All other Single modes | 39.0 | 0.3 | 32.4 | – | 27.5 | – | 4.4 |
| Multiple modes | 18.5 | 2.7 | 36.6 | 0.4 | 36.5 | 1.5 | 6.6 |
| Parcel, USPS or courier | 9.6 | 1.5 | 16.9 | 0.1 | 16.7 | 0.3 | 6.6 |
| All other multiple modes | S | S | 49.2 | 0.3 | 44.1 | 1.3 | S |
| Other and unknown modes | 26.9 | 0.9 | 20.4 | 0.1 | 28.0 | 0.4 | 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.