نتایج جستجو برای: selected through stratified sampling method

تعداد نتایج: 3185509  

Journal: :management studies and economic systems 2014
md. abdul latif shahida khanom

small scale industries are suffering most from the marketing problems due to their owners’ attitudes, units’ capacity, and quality of products along with the scale of production. the researchers analyzed the problems of selected twenty small scale industrial units of various industrial groups of industrial estates of sylhet division of bangladesh to get insights of the problem. primary and seco...

Journal: :کشاورزی (منتشر نمی شود) 0
حسین شعبانعلی فمی استادیار، گروه ترویج و آموزش کشاورزی، دانشکده اقتصاد و توسعه کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران فاطمه شفیعی کارشناس ارشد، گروه ترویج و آموزش کشاورزی، دانشکده اقتصاد و توسعه کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران

the main purpose of this research was to perform an analysis of the attitude of male and female students towards agrisciences in the college of agriculture and natural resources of the university of tehran. it was a correlational-descriptive research which was conducted through a survey method. the statistical population of the study consisted of 1677 male and female students, out of which 236 ...

2016
Alka Ahuja

Objective: A study was conducted to ascertain the impact of dysmenorrhea on quality life of adolescent girls of Chandigarh. Methods: Multistage stratified sampling was done and 5 sectors, 5 villages, 5 slums were selected by lottery method. Then from each area 20 respondents were selected by simple random sampling. A Self-designed interview schedule was used to collect data from 300 Adolescent ...

2009
Iain A Macdonald

Sensitivity analysis is a key part of a comprehensive energy simulation study. Monte-Carlo techniques have been successfully applied to many simulation tools. Several sampling techniques have been proposed in the literature; however to date there has been no comparison of their performance for typical building simulation applications. This paper examines the performance of simple random, strati...

Kambiz Karimi Nasim Izadi Reza Movahedi

This research has an aim to assess agricultural students' satisfaction from their field of study. The statistical population consisted of 1040 students from the University of Bu Ali Sina (800 bachelor and 240 master students) during the years of 2011 to 2013. Through stratified random sampling method 240 bachelor and 80 master students were selected. Data was collected by means of a researcher ...

Journal: :Mathematical and Computer Modelling 2006
Lucinio Judez Carolina Chaya José María de Miguel Rafael Bru

A comparison is made between the variance of the estimator of the total of a variable obtained from both a simple and a stratified random sampling, in which the sample sizes of some strata are equal to the stratum population size. It is shown that in this case, the advantage of the stratified sample could depend on the sample size. The paper presents inequalities that determine, as a function o...

2013
Mohamed Abouelenien Xiaohui Yuan

SampleBoost is an intelligent multi-class boosting algorithm that employs an error parameter combined with stratified sampling during training iterations to accommodate multi-class data sets and avoid problems associated with traditional boosting methods. In this paper we investigate the choice of the error parameter along with the preferred sampling sizes for our method. Experimental results s...

Journal: :اخلاق در علوم و فناوری 0

background: ethical leadership represents the leader's proactive efforts to influence followers' ethical and unethical behavior and follower work attitudes such as perceived organizational support, affective commitment and normal behaviors. the purpose of this research was to test the relationship of ethical leadership and ethical context with affective commitment that mediating the r...

1996
Michel Cukier Jean Arlat David Powell

Abstract. This paper addresses the problem of estimating the coverage of fault tolerance through statistical processing of observations collected in fault-injection experiments. In an earlier paper, we have studied various frequentist estimation methods based on simple sampling in the whole fault/activity input space and stratified sampling in a partitioned space. In this paper, Bayesian estima...

Journal: :کشاورزی (منتشر نمی شود) 0
غلام حسین عبداله زاده دانشجوی دکتری توسعه کشاورزی، دانشکده اقتصاد و توسعه دانشکده کشاورزی، دانشگاه تهران، تهران - ایران‏ خلیل ‏کلانتری دانشیار دانشکده اقتصاد و توسعه کشاورزی، دانشکده کشاورزی، دانشگاه تهران، تهران - ایران‏

in order to analyse the effective factors contributing to land fragmentation, required data ‎were collected by questionnaire from 151 farmers who were selected through a stratified random ‎sampling design from 12 villages of ramjerd yek subdistrict of marvdasht country. factor analysis ‎was used to identity explanatory factors of land fragmentation. the variables of natural-farming, ‎socio-cult...

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