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 | 20.6 | – | 25.9 | – | 20.9 | – | 25.2 |
| Single modes | 23.6 | 2.5 | 26.1 | 0.2 | 21.3 | 0.6 | 38.8 |
| Truck | 25.8 | 2.9 | 19.5 | 5.3 | 13.0 | 5.8 | 41.4 |
| Rail | 11.5 | 0.4 | 30.1 | 2.0 | 25.0 | 4.3 | 33.3 |
| All other Single modes | 39.1 | 2.1 | S | S | S | S | 13.9 |
| Multiple modes | 18.4 | 2.3 | 24.0 | 0.1 | 31.5 | 0.3 | 9.0 |
| Parcel, USPS or courier | 18.4 | 2.3 | 14.6 | – | 21.9 | 0.2 | 9.0 |
| All other multiple modes | S | S | S | S | S | S | 29.9 |
| Other and unknown modes | 44.8 | 1.2 | 25.4 | 0.2 | 43.3 | 0.5 | 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.