| Main Title |
Precision of Variable Sampling When the Response Variable and Inclusion Probabilities Are Not Highly Correlated. |
| Author |
Stehman., S. V. ;
|
| CORP Author |
Oregon State Univ., Corvallis. Dept. of Statistics.;Corvallis Environmental Research Lab., OR. |
| Publisher |
Apr 94 |
| Year Published |
1994 |
| Report Number |
EPA-R-816721; EPA/620/R-94/013; |
| Stock Number |
PB94-160546 |
| Additional Subjects |
Sampling ;
Environmental monitoring ;
Probability theory ;
Population(Statistics) ;
Mathematical models ;
Statistical samples ;
Variance(Statistics) ;
Correlations ;
Variable probability ;
EMAP(Environmental Monitoring and Assessment Program) ;
Environmental Protection Agency
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB94-160546 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
14p |
| Abstract |
Variable probability sampling may be less efficient than simple random sampling if the response variable, y, is not highly positively correlated with the auxiliary variable, x, used to select the sample. Simulation results using binary and continuous response variables demonstrate quantitatively how much precision may be lost in this situation. Variable probability sampling may be less efficient for populations with correlations as high as .50, and efficiency relative to simple random sampling may be as low as 25-50% for low correlation populations. |
| Supplementary Notes |
Also pub. as Oregon State Univ., Corvallis. Dept. of Statistics rept. no. TR-144. Sponsored by Corvallis Environmental Research Lab., OR. |
| NTIS Title Notes |
Technical rept. |
| Category Codes |
68; 72F |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/02 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
413330827 |
| Origin |
NTIS |
| Type |
CAT |
