نتایج جستجو برای: bias value of 25042 cmmin

تعداد نتایج: 21198882  

2002
Erica Field

This paper explores how the timing of career-contingent financial aid influences its effectiveness in encouraging law students to enter public interest work, and hence the isolated effect of educational debt timing on career choice. I analyze quasi-experimental data from NYU Law School’s Innovative Financial Aid Study, in which careercontingent financial aid packages with equivalent net values ...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی مشهد - دانشکده دندانپزشکی 1393

مقدمه: در مطالعات مختلف اتیولوژی ترس دندانپزشکی و مشکلات مدیریت رفتاری کودکان بررسی شده است و یکی از عوامل دخیل در این مشکلات ممکن است سرشت کودک باشد. هدف از مطالعه حاضر بررسی نقش سرشت و متغیرهای سرشتی در میزان اضطراب و همکاری کودکان پیش دبستانی در کلینیک دندانپزشکی است. مواد و روش: در این مطالعه مقطعی، 103 بیمار(39 پسرو 64 دختر) 6-4 ساله، به منظور ارزیابی نوع سرشت ومیزان اضطراب در کلینیک دندا...

Journal: :international journal of agricultural science, research and technology in extension and education systems 2011
m. a, sabbagi

considering iran geographical location, water is the most limited factor in agriculture section. therefore, it would be logical to consider water as one of the most significant criteria in selection of cultivation model. the purpose of this study is assigning cultivation pattern based on economic value of water in gotvand township in agronomic year 2008-2009. so it was necessary to computes the...

Haidar Mirzai Iman Saleh Khabat Khosravi,

Runoff estimation resulted from precipitation is the basis of more study in various develop and exploit design from water resource, then its measure and calculation due to environmental bottlenecks, always have a plenty problem. As a result of the importance of output runoff estimation and flood volume in watershed for the sake of country integrated watershed management in this study tried to 9...

Haidar Mirzai Iman Saleh Khabat Khosravi,

Runoff estimation resulted from precipitation is the basis of more study in various develop and exploit design from water resource, then its measure and calculation due to environmental bottlenecks, always have a plenty problem. As a result of the importance of output runoff estimation and flood volume in watershed for the sake of country integrated watershed management in this study tried to 9...

سوری, حمید, شکیبا, مریم, منصورنیا, محمدعلی,

Standard methods for estimating exposure effects in longitudinal studies will result in biased estimates of the exposure effect in the presence of time-dependent confounders affected by past exposure.  In the present review article, we first described the assumptions required for estimating the causal effect in longitudinal studies and their structure regarding various types of exposure and ...

2012
Jhon James Mora Rodriguez Juan Muro

In the presence of selection bias, traditional estimators of pseudo panel data are inconsistent. In this paper, the authors derive the conditions under which consistence is achieved in pseudo-panel estimation and propose a simple test of selection bias. Specifically, they propose a Wald test for the null hypothesis that there is no selection bias. Under rejection of the null hypothesis, the aut...

ایزدی خواه, زهرا, فدایی, فربد , قاسم زاده, حبیب ا...,

Objective: the study was designed to examine explicit memory bias in trait-anxiety and obsessive compulsive disorder. Method: memory bias was examined in three groups of subjects: low-trait  anxious (20 subjects), high-trait anxious (20 subjects), and obsessive compulsive patients (20 subjects) in whom danger schema were activated after they were exposed the threat-related material. The trait-a...

ژورنال: پژوهش های ریاضی 2019

One of a nonparametric procedures used to estimate densities is kernel method. In this paper, in order to reduce bias of  kernel density estimation, methods such as usual kernel(UK), geometric extrapolation usual kernel(GEUK), a bias reduction kernel(BRK) and a geometric extrapolation bias reduction kernel(GEBRK) are introduced. Theoretical properties, including the selection of smoothness para...

1997
Anthony H. Gonzalez

This paper investigates the impact of Malmquist bias on the distance to the Virgo cluster determined by the H0 Key Project using M100, and consequently on the derived value of H0. Malmquist bias is a volume-induced statistical effect which causes the most probable distance to be different from the raw distance measured. Consideration of the bias in the distance to the Virgo cluster raises this ...

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