sample meansample mean distributionsample mean vectorsample mediansample numbersample of size nsample pathsample placesample pointsample problemsample rangesample sizesample spacesample standard deviationsample surveysample unitsample valuesample valuessample variancesample variance covariance matrixsample vectorsampledsamplingsampling approachsampling by attributessampling by variablessampling designsampling distributionsampling distribution meansampling errorsampling fluctutationsampling fractionsampling inspectionsampling intervalsampling momentssampling on several occasionssampling plansampling proceduresampling ratiosampling sizesampling surveysampling techniquesampling theoremsampling theorysampling unitsampling variancesampling with replacementsampling with replacement schemesampling without replacementsampling without replacement scheme