OLS : Record


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
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
Library   Call Number Additional Info Location Date Modified
NTIS PB94-160546 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 09/01/1994
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
Control Number 413330827
Cataloging Source NTIS/MT
Origin NTIS
Type CAT