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 | 5.2 | – | 12.9 | – | 14.9 | – | 22.7 |
| Single modes | 6.9 | 2.0 | 12.3 | 2.9 | 15.1 | 0.3 | 36.8 |
| Truck | 5.9 | 1.4 | 19.0 | 4.3 | 12.0 | 4.4 | 38.1 |
| Rail | 20.4 | 1.0 | 18.5 | 5.1 | 18.2 | 4.9 | 13.1 |
| All other Single modes | S | S | S | S | S | S | 10.4 |
| Multiple modes | 11.9 | 1.8 | 25.8 | – | 19.8 | 0.3 | 13.9 |
| Parcel, USPS or courier | 12.2 | 1.7 | 11.7 | – | 11.5 | – | 13.9 |
| All other multiple modes | 43.6 | 0.3 | 40.2 | – | 26.5 | 0.3 | 32.7 |
| Other and unknown modes | 24.0 | 0.4 | 48.4 | 2.9 | 31.5 | – | 33.4 |
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.