نتایج جستجو برای: percentile estimator

تعداد نتایج: 42349  

ژورنال: پژوهش های ریاضی 2018

Introduction      In classical methods of statistics, the parameter of interest is estimated based on a random sample using natural estimators such as maximum likelihood or unbiased estimators (sample information). In practice,  the researcher has a prior information about the parameter in the form of a point guess value. Information in the guess value is called as nonsample information. Thomp...

1999
Brian T. Park Richard M. Morgan James R. Hackney John Lee Sheldon L. Stucki Johanna C. Lowrie

In September of 1996, United States Congress directed the National Highway Traftic Safety Administration (NHTSA) to conduct a feasibility study toward establishing a Federal Motor Vehicle Safety Standard (FMVSS) for frontal offset crash testing. Congress stated that these activities should reflect ongoing efforts to enhance ir ternational harmonization of safety standards. The offset c~.:.sh te...

ژورنال: اندیشه آماری 2014

In this article introduce the sequential order statistics. Therefore based on multiply Type-II censored sample of sequential order statistics, Bayesian estimators are derived for the parameters of one- and two- parameter exponential distributions under the assumption that the prior distribution is given by an inverse gamma distribution and the Bayes estimator with respect to squared error loss ...

In most situations the best estimator of a function of the parameter exists, but sometimes it has a complex form and we cannot compute its variance explicitly. Therefore, a lower bound for the variance of an estimator is one of the fundamentals in the estimation theory, because it gives us an idea about the accuracy of an estimator. It is well-known in statistical inference that the Cram&eac...

Journal: :The Journal of Educational Research 1922

ژورنال: پژوهش های ریاضی 2020

The standard kernel density estimator suffers from a boundary bias issue for probability density function of distributions on the positive real line. The Gamma kernel estimators and orthogonal series estimators are two alternatives which are free of boundary bias. In this paper, a simulation study is conducted to compare small-sample performance of the Gamma kernel estimators and the orthog...

Journal: :Pakistan Journal of Statistics and Operation Research 2007

Journal: :international journal of pediatrics 0
fatemeh taheri birjand atherosclerosis and coronary artery research center, associate professor of pediatric, birjand university of medical sciences(bums), tayebeh chahkandi birjand atherosclerosis and coronary artery research center, assistante professor of pediatric toba kazemi professor of cardiology, birjand university of medical sciences(bums bita bijari assistante professor of social medicine, birjand university of medical sciences(bums

abstract:introduction: racial and environmental differences in communities leading cause of differences in serum lipids. it can be said this study aimed in assessing percentile curves of serum lipid profile about 6-18 years old students of birjand.method: the present cross-sectional study was done on 4168 students of birjand aged 6-18 years. they were classified into three age groups 6-10 and 1...

Journal: :iranian journal of science and technology (sciences) 2010
m. salehi

we develop a two phase sampling procedure to determine the sample size necessary to estimatethe population mean of a normally distributed random variable and show that the resulting estimator has preassigned variance and is unbiased under a regular condition. we present a necessary and sufficient condition under which the final sample mean is an unbiased estimator for the population mean.

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