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 | 8.9 | – | 26.0 | – | S | S | 8.1 |
| Single modes | 9.7 | 2.1 | 27.6 | 5.0 | S | S | 17.0 |
| Truck | 11.4 | 3.3 | 13.4 | 7.3 | 9.3 | 13.6 | 20.5 |
| Rail | S | S | S | S | S | S | 12.7 |
| All other Single modes | 32.3 | 1.5 | 48.5 | 1.1 | 37.3 | 0.6 | 6.8 |
| Multiple modes | 24.4 | 2.3 | S | S | S | S | 3.6 |
| Parcel, USPS or courier | 11.8 | 1.6 | 12.4 | – | 12.1 | 0.3 | 3.6 |
| All other multiple modes | S | S | S | S | S | S | 22.4 |
| Other and unknown modes | 18.6 | 0.9 | 27.2 | 0.8 | 23.3 | 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.