A skewed truncated t distribution
نویسندگان
چکیده
Skewed symmetric distributions have attracted a great deal of attention in the last few years. One of them, the skewed t distribution suffers from limited applicability because of the lack of finite moments. This note proposes an alternative to the skewed t distribution, which we refer to as skewed truncated t distribution. It is defined by the pdf f(z) = 2g(x)G(Ax), where g(.) and G(.) are taken, respectively, to be the pdf and the cdf of a truncated t distribution. The note derives various properties of this distribution, including its moments.
منابع مشابه
Using Weighted Distributions for Modeling Skewed, Multimodal and Truncated Data
When the observations reflect a multimodal, asymmetric or truncated construction or a combination of them, using usual unimodal and symmetric distributions leads to misleading results. Therefore, distributions with ability of modeling skewness, multimodality and truncation have been in the core of interest in statistical literature, always. There are different methods to contract ...
متن کاملExploring Skewed Parton Distributions with Two-body Models on the Light Front: bimodality
We explore skewed parton distributions for simple, model wave-functions in a truncated two-body Fock space. Consideration of non-Gaussian wave functions is our main emphasis, from which we observe the distributions are bimodal (there can be two distinct peaks) in the Fock-space diagonal overlap region (x > ξ). We demonstrate that this behavior arises from convoluting two light-front wave functi...
متن کاملExploring Skewed Parton Distributions with Two-body Models on the Light Front I: bimodality
We explore skewed parton distributions for simple, model wave-functions in a truncated two-body Fock space. Consideration of non-Gaussian wave functions is our main emphasis, from which we observe the distributions are bimodal (there can be two distinct peaks) in the Fock-space diagonal overlap region (x > ξ). We demonstrate that this behavior arises from convoluting two light-front wave functi...
متن کاملThe Stock Returns Volatility based on the GARCH (1,1) Model: The Superiority of the Truncated Standard Normal Distribution in Forecasting Volatility
I n this paper, we specify that the GARCH(1,1) model has strong forecasting volatility and its usage under the truncated standard normal distribution (TSND) is more suitable than when it is under the normal and student-t distributions. On the contrary, no comparison was tried between the forecasting performance of volatility of the daily return series using the multi-step ahead forec...
متن کاملDynamic Bayesian Information Measures
This paper introduces measures of information for Bayesian analysis when the support of data distribution is truncated progressively. The focus is on the lifetime distributions where the support is truncated at the current age t>=0. Notions of uncertainty and information are presented and operationalized by Shannon entropy, Kullback-Leibler information, and mutual information. Dynamic updatings...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Mathematical and Computer Modelling
دوره 40 شماره
صفحات -
تاریخ انتشار 2004