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 | 7.5 | – | 15.4 | – | 19.5 | – | 18.1 |
| Single modes | 8.9 | 2.0 | 16.3 | 3.3 | 19.5 | 1.3 | 27.7 |
| Truck | 9.5 | 3.5 | 13.7 | 4.7 | 7.3 | 6.6 | 27.7 |
| Rail | 24.2 | 0.9 | 26.5 | 5.7 | 26.6 | 7.3 | 15.2 |
| All other Single modes | S | S | 30.1 | 1.7 | 25.0 | 0.5 | 11.8 |
| Multiple modes | 11.2 | 1.4 | 47.9 | 0.9 | 40.6 | 1.0 | 9.7 |
| Parcel, USPS or courier | 10.8 | 1.1 | 14.4 | – | 14.7 | 0.2 | 9.8 |
| All other multiple modes | 28.3 | 0.5 | S | S | 46.7 | 1.0 | 15.3 |
| Other and unknown modes | S | S | S | S | 48.4 | 0.9 | 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.