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 | 6.5 | – | 18.7 | – | 14.2 | – | 9.5 |
| Single modes | 7.5 | 1.5 | 19.5 | 1.2 | 15.2 | 2.0 | 15.8 |
| Truck | 8.1 | 1.7 | 19.8 | 3.6 | 17.1 | 4.9 | 16.1 |
| Rail | 15.7 | 0.2 | 15.8 | 0.3 | 25.3 | 3.9 | 18.4 |
| All other Single modes | 23.1 | 0.7 | S | S | S | S | 11.1 |
| Multiple modes | 9.6 | 1.7 | 45.4 | 1.2 | 43.8 | 2.0 | 8.1 |
| Parcel, USPS or courier | 9.5 | 1.4 | 20.3 | 0.1 | 12.1 | 0.3 | 8.1 |
| All other multiple modes | S | S | S | S | S | S | 27.9 |
| Other and unknown modes | 36.2 | 0.8 | 28.4 | 0.3 | 28.8 | 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.