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 | 12.7 | – | 43.1 | – | 12.4 | – | 19.8 |
| Single modes | 14.5 | 2.6 | 43.8 | 1.4 | 13.9 | 2.5 | 36.0 |
| Truck | 15.1 | 2.9 | 44.6 | 2.6 | 17.7 | 5.3 | 39.9 |
| Rail | 24.3 | 0.3 | 25.4 | 1.9 | 34.7 | 5.2 | 13.2 |
| All other Single modes | 29.2 | 1.0 | S | S | S | S | 4.7 |
| Multiple modes | 17.9 | 2.0 | 23.5 | 0.2 | 18.1 | 1.1 | 12.4 |
| Parcel, USPS or courier | 20.0 | 2.1 | 10.3 | – | 8.6 | 0.2 | 12.4 |
| All other multiple modes | 27.1 | 0.4 | 33.5 | 0.2 | 26.0 | 1.0 | 10.9 |
| Other and unknown modes | 26.9 | 1.2 | 45.5 | 1.4 | S | S | 43.3 |
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.