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 | 3.8 | – | 38.5 | – | 14.8 | – | 11.7 |
| Single modes | 4.0 | 1.2 | 41.9 | 4.0 | 15.6 | 1.2 | 14.1 |
| Truck | 3.5 | 2.3 | S | S | 4.5 | 5.6 | 16.2 |
| Rail | 17.0 | 1.3 | 26.8 | 5.5 | 28.9 | 7.6 | 6.9 |
| All other Single modes | 36.4 | 1.4 | S | S | S | S | 17.9 |
| Multiple modes | 8.7 | 1.2 | 30.1 | 0.1 | 26.6 | 1.0 | 8.6 |
| Parcel, USPS or courier | 9.0 | 1.0 | 13.0 | – | 21.0 | 0.3 | 8.6 |
| All other multiple modes | S | S | 46.4 | – | 39.0 | 0.9 | 11.9 |
| Other and unknown modes | 15.5 | 0.4 | 32.6 | 4.0 | 20.1 | 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.