نتایج جستجو برای: population size

تعداد نتایج: 1199768  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده ریاضی 1390

the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده روانشناسی و علوم تربیتی 1391

the purpose of this study was the relationship between problem – solvi ability with fdi cognitive style of students.the research method was correlation method. for data analysis pearson test was used. statistical society in this research was all the students of alligoodarz city in 1391-92 year.to sampling of statiscal population was used sampling multi-stage random the size of sample selected 2...

Journal: :iranian journal of public health 0
mohsen shati 1. dept. of epidemiology and biostatistics, school of public health, tehran university of medical sciences , tehran, iran. aliakbar haghdoost 2. research center for modeling in health, institute for futures studies in health, kerman university of medical sciences , kerman, iran. reza majdzadeh 1. dept. of epidemiology and biostatistics, school of public health, tehran university of medical sciences , tehran, iran. kazem mohammad 1. dept. of epidemiology and biostatistics, school of public health, tehran university of medical sciences , tehran, iran. seyedesalehe mortazavi 3. dept. of health promotion and education, school of public health, tehran university of medical sciences , tehran, iran.

network scale-up is an indirect method for estimating the size of hidden, hard-to-count or high risk populations. social network size estimation is the first step in this method. the present study was conducted with the purpose of estimating the social network size of the tehran province residents and its determinants.maximum likelihood estimation was applied to estimate people's network sizes ...

Journal: :international journal of advanced biological and biomedical research 2015
aynalem gebre bizuayehu tesfaye beemnet mengesha kassahun

objective: taro (colocasia esculenta l. schott) is a perennial root crop that belongs to araceace family.  it is widely cultivated as a staple food in africa, asia and pacific islands. despite its importance, there is limited information on many aspects of the crop. in order to obtain data that can support improved and sustainable taro production, a field trial was conducted to study the effect...

Journal: :American Journal of Public Health 2017

Journal: :Current Biology 2002

Journal: :international journal of advanced biological and biomedical research 2015
aynalem gebre bizuayehu tesfaye beemnet mengesha kassahun

taro (colocasiaesculental. schott) is a perennial root crop that belongs to araceace family. it is widely cultivated as a staple food in africa, asia and pacific islands. despite its importance, there is limited information on many aspects of the crop. in order to obtain data that can support improved and sustainable taro production, a field trial was conducted to study the effects of corm size...

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