ssaddle pointsaddle point approximationsafequardsafetysafety campaignsaint petersburg paradoxsalem singular distributionsampford samplingsamplesample autocorrelationsample autocovariancesample correlation coefficientsample covariancesample designsample functionsample meansample mediansample numbersample pathsample pointsample reusesample sizesample size determinationsample size estimationsample spacesample surveysample variancesamplingsampling designsampling distributionsampling errorsampling fractionsampling framesampling from finite populationsampling inspectionsampling intervalsampling methodsampling momentsampling optimizationsampling plansampling schemesampling surveysampling unitsampling variancesampling with replacementsampling without recallsampling without replacementsampling zerossamuelson nair inequality