December 6, 2025
Fazlollah Lak

Fazlollah Lak

Academic Rank: Associate professor
Address:
Degree: Ph.D in Statistics
Phone: 077
Faculty: Faculty of Intelligent Systems and Data Science

Research

Title
Inference about the change point for changes in the mean of gaussian sequences
Type Thesis
Keywords
برآوردگر درست نمايي ماكسيمم، دنباله هاي گاوسي، نقطه تغيير
Researchers zahra dehghani (Student) , Mohammad Esmail Dehghan Monfared (First primary advisor) , Fazlollah Lak (Advisor)

Abstract

{In this thesis, the asymptotic distribution of the maximum likelihood estimate (MLE) of the change-point is derived when a change occurs in the mean of a sequence of temporally ordered normal random variables at an unknown point. It is demonstrated that this distribution can also be employed to approximate the distribution of the MLE of the change-point in the case of a change in the mean of a multivariate normal process. Using simulations, the accuracy of this distribution is evaluated. Finally, confidence intervals for the change-point are constructed based on two proposed methods, and their efficiency is compared.