This article develops a method of ratio estimate in fuzzy sense. By both the simple random sampling and stratified random sampling, we can obtain the ratio estimate in usual statistical sense. However, the sampling data may be ambiguous in some uncertain circumstance. To solve such kind of problem, we probe into the simple random sampling and stratified random sampling in fuzzy sense, obtain th...

The understanding of the behavioural aspects of a software system is an important enabler for many reverse engineering activities. The behaviour of software is typically represented in the form of execution traces. Traces, however, can be overwhelmingly large. To reduce their size, sampling techniques, especially the ones based on random sampling, have been extensively used. Random sampling, ho...

Data collection mechanism is a crucial factor for the performance of intrusion detection system (IDS). Simple random sampling and Stratified random sampling techniques of statistics are introduced to the procedure of data collection for IDS, and formulas used to calculate the sample size of packets based on these sampling techniques are presented. The implementation of packets sampling is provi...

We consider the problem of adaptive stratified sampling for Monte Carlo integration of a differentiable function given a finite number of evaluations to the function. We construct a sampling scheme that samples more often in regions where the function oscillates more, while allocating the samples such that they are well spread on the domain (this notion shares similitude with low discrepancy). ...

empowerment employee is one of effective techniques to increase employee's productivity and efficient use of the capacity and capabilities of individual and group them in line with organizational goals. the aim of this study is to investigate the relationship of ethical leadership with psychological empowerment with mediating of procedural justice and interactional justice.participants inc...

the main purpose of this study was to investigate experts’ perceptions of barriers to organic farming in ministry of agriculture. the population of this survey consisted of the experts in department of horticultural products, ministry of agriculture in 2008-2009 (n= 160). using of kerejcie and morgan table, 113 experts were selected through stratified random sampling method. validity of the ins...

We show how to do efficient moment based inference using the generalized method of moments (GMM) when data is collected by standard stratified sampling and the maintained assumption is that the aggregate shares are known.