Table B-10. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group for State of Origin: 2002 and 1997
Monday, July 2, 2012
Table B-10. Estimated Measures of Reliability for Shipment Characteristics by Commodity Group for State of Origin: 2002 and 1997
[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]
| Code | Commodity (2-digit SCTG) | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | ||
| All Commodities | 40.9 | 21.0 | 127.1 | 46.0 | 37.6 | 47.8 | 29.4 | 30.0 | 66.0 | 43.8 | S | S | |
| 01-05 | Agriculture products and fish | 48.5 | S | S | S | S | S | S | S | S | 32.4 | 31.3 | 35.2 |
| 06-09 | Grains, alcohol, and tobacco products | 23.1 | 34.6 | 39.5 | 27.4 | S | S | 29.2 | 46.3 | 26.8 | 38.0 | 29.8 | 162.9 |
| 10-14 | Stones, non-metallic minerals, and metallic ores | S | S | S | S | S | S | S | S | S | 31.6 | 31.6 | 287.7 |
| 15-19 | Coal and petroleum products | S | - | S | S | - | S | S | - | S | 31.6 | - | - |
| 20-24 | Pharmaceutical and chemical products | S | S | S | 42.0 | S | S | S | S | S | 37.4 | 28.2 | 631.1 |
| 25-30 | Logs, wood products, and textile and leather | S | 46.6 | S | 38.9 | 35.7 | 39.5 | 41.6 | S | S | 28.0 | 33.9 | 33.6 |
| 31-34 | Base metal and machinery | 32.7 | 41.7 | 23.3 | S | 46.1 | S | S | 49.9 | S | S | S | S |
| 35-38 | Electronic, motorized vehicles, and precision instruments | S | S | S | 43.8 | S | S | S | S | S | S | 31.6 | S |
| 39-43 | Furniture, mixed freight and misc manufactured products | 30.8 | 48.3 | 206.6 | 24.6 | S | S | 28.5 | S | S | 35.0 | 41.1 | 61.0 |
| -- | Commodity Unknown | S | S | S | S | S | S | S | S | S | S | 31.6 | 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, Individual State Data, December 2004.