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 | 14.5 | – | 13.8 | – | 18.4 | – | 9.3 |
| Single modes | 16.8 | 2.0 | 14.1 | 0.5 | 19.0 | 1.1 | 30.9 |
| Truck | 17.7 | 2.7 | 15.7 | 4.2 | 10.8 | 6.4 | 31.7 |
| Rail | 27.2 | 0.3 | 30.6 | 4.2 | 33.6 | 7.1 | 24.4 |
| All other Single modes | 30.1 | 1.3 | S | S | S | S | 8.6 |
| Multiple modes | 7.4 | 1.6 | 13.5 | 0.2 | 19.8 | 1.0 | 5.9 |
| Parcel, USPS or courier | 6.0 | 1.5 | 8.1 | 0.1 | 11.8 | 0.4 | 5.9 |
| All other multiple modes | S | S | S | S | S | S | 38.3 |
| Other and unknown modes | 21.1 | 0.7 | 37.0 | 0.4 | 49.4 | 0.6 | 32.4 |
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.