نتایج جستجو برای: one sample

تعداد نتایج: 2310989  

Journal: :Springer proceedings in mathematics & statistics 2023

Let $${\mathbb {X}}= (X_i)_{1\le i \le n}$$ be an i.i.d. sample of square-integrable variables in $$\mathbb {R}^d$$ , with common expectation $$\mu $$ and covariance matrix $$\varSigma both unknown. We consider the problem testing if is $$\eta -close to zero, i.e. $$\Vert \mu \Vert \eta against \ge (\eta + \delta )$$ ; we also tackle more general two-sample mean closeness (also known as relevan...

ژورنال: Hormozgan Medical Journal 2006
Dabiri, Sh. , Divsalar, K. , Karimi Afshar, R. , Nakhaei, N. , Shamsi Maimandi, M. ,

Introduction: Comparing to other health problems, substance use epidemiology is a new area of research in Iran. The aim of this study was to determine the prevalence of opioid use among referees to a clinical laboratory by drug testing. Methods: In this cross-sectional study, the urine sample of 1120 consecutive individuals referred to a major clinical laboratory in Kerman city were tested for...

this thesis attempts to investigate the effects of prelistening activities on enhancing iranian efl learners` listening comprehension. the present study investigated ways in which learners` background knowledge could be activated in order to enhance their l2 listening comprehension by limiting the number of possible text interpretations prior to listening. the experiments conducted in this study examined the effect of prior knowledge and vocabulary teaching on iranian efl learners listening comprehension. the current study has two purposes: one is to investigate the effect of background knowledge on the second language listening comprehension of iranian intermediates and the other is to determine whether second language is facilitated by the introduction of unknown vocabularies in the form of prelistening activities. to conduct the study different instruments such as listening proficiency test and four listening tests such as pre and posttests were used and various statistical processes and techniques including paired-sample t-test, and analysis of variance (anova) were used. the findings of this study supported all three hypotheses tested. differences were found between the means of preteaching vocabulary variable, the background knowledge activation variable, and mean difference between these two strategies variable. subjects scored higher when the unknown words were taught in advance. likewise, subjects scored higher when they were asked some relevant questions about the topic than on those without them. there was, in addition, a significant difference between the means of preteaching vocabulary strategy and background knowledge activation strategy. in fact, preteaching vocabulary had a better effect in enhancing the students’ listening comprehension, in comparison to background knowledge activation strategy.

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1390

this thesis attempts to investigate the effects of prelistening activities on enhancing iranian efl learners` listening comprehension. the present study investigated ways in which learners` background knowledge could be activated in order to enhance their l2 listening comprehension by limiting the number of possible text interpretations prior to listening. the experiments conducted in this stud...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده مدیریت 1393

موضوع این پژوهش " بررسی امکان سنجی استقرار بودجه ریزی عملیاتی و شناسایی موانع استقرار آن در شرکت راه آهن جمهوری اسلامی ایران " می باشد . روش این تحقیق از نطر هدف یک تحقیق کاربردی واز نظر نحوه گردآوری داده ها ، توصیفی (غیر آزمایشی) – پیمایشی است و ابزار گردآوری اطلاعات ، شیوه میدانی بوده که با استفاده از پرسشنامه به کار گرفته شده است . مدل مورد استفاده این تحقیق ، مدل جامع بودجه ریزی عملیاتی ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه قم - دانشکده حسابداری و مدیریت 1390

سرمایه گذاری یک امر ضروری و حیاتی در جهت رشد و توسعه اقتصادی هر کشوری است و برای فراهم کردن وجوه لازم برای آن، نیاز به وجود منابعی برای تأمین سرمایه است. در این میان موسسات بیمه با داشتن منابع گسترده مالی، به عنوان یکی از منابع مهم تأمین مالی و سرمایه گذاری مطرح میباشند. همچنین شرکتهای بیمه با توجه به ماهیت عملیاتی که انجام میدهند، متعهد به پرداخت خسارت در آینده (زمان وقوع حادثه) میباشند. به هم...

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