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 | 6.9 | – | 10.0 | – | 8.4 | – | 5.7 |
| Single modes | 7.8 | 1.8 | 9.8 | 0.5 | 8.9 | 1.2 | 25.6 |
| Truck | 7.9 | 1.6 | 10.2 | 1.2 | 9.1 | 3.5 | 24.6 |
| Rail | 26.4 | 0.5 | 23.7 | 0.8 | 20.6 | 2.8 | 13.9 |
| All other Single modes | 38.1 | 0.6 | S | S | S | S | 9.2 |
| Multiple modes | 12.2 | 1.6 | 12.1 | 0.1 | 14.1 | 0.4 | 9.6 |
| Parcel, USPS or courier | 12.6 | 1.3 | 14.7 | 0.1 | 8.2 | 0.1 | 9.6 |
| All other multiple modes | 48.6 | 0.6 | 41.2 | – | 47.0 | 0.3 | 25.8 |
| Other and unknown modes | 25.7 | 0.6 | 33.9 | 0.5 | 42.6 | 1.1 | 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.