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 | 10.7 | – | 31.8 | – | 8.9 | – | 13.1 |
| Single modes | 12.7 | 2.2 | 33.0 | 1.7 | 7.2 | 2.8 | 23.0 |
| Truck | 14.3 | 3.7 | 18.3 | 6.4 | 6.1 | 3.8 | 28.6 |
| Rail | 19.7 | 0.5 | 30.7 | 3.4 | 14.4 | 3.0 | 14.6 |
| All other Single modes | 42.3 | 4.1 | S | S | 22.9 | 5.0 | 8.0 |
| Multiple modes | 9.5 | 1.9 | S | S | S | S | 8.2 |
| Parcel, USPS or courier | 10.8 | 1.9 | 12.1 | – | 13.1 | 0.1 | 8.2 |
| All other multiple modes | 30.0 | 0.4 | S | S | S | S | 19.2 |
| Other and unknown modes | 35.4 | 0.9 | S | S | S | S | 32.7 |
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.