Zobrazeno 1 - 10
of 35
pro vyhledávání: '"M. HAFIDZ OMAR"'
Publikováno v:
Mathematics, Vol 11, Iss 3, p 566 (2023)
Mortality modelling is a practical method for the government and various fields to obtain a picture of mortality up to a specific age for a particular year. However, some information on the phenomenon may remain in the residual vector and be unreveal
Externí odkaz:
https://doaj.org/article/8f2ba9cff82643a9815ac52fbfb2e42a
Publikováno v:
Journal of Taibah University for Science, Vol 14, Iss 1, Pp 177-191 (2020)
Control chart is a popular technique that is widely used in statistical process control to identify any possible deviations from a stable state of a process. Shewhart charts are famous for identifying larger shifts, while cumulative sum and exponenti
Externí odkaz:
https://doaj.org/article/19c84b28397b470a914ed8444f66b0ac
Publikováno v:
Revstat Statistical Journal, Vol 19, Iss 1 (2021)
A new modification of ranked set sampling (RSS) is investigated to estimate the mean of the study population. This modified approach is a double-stage approach and a kind of combination between RSS and median RSS (MRSS). It is shown that this new mod
Externí odkaz:
https://doaj.org/article/4abfab50b2ac4b56a63f150f58d1e1c1
Publikováno v:
Mathematics, Vol 10, Iss 12, p 2025 (2022)
The special causes of variations, which is also known as a shift, can occur in a single or more than one related process characteristics. Statistical process control tools such as control charts are useful to monitor shifts in the process parameters
Externí odkaz:
https://doaj.org/article/c8551f1df71d46c28e56074af14920a4
Autor:
Emmanuel Afuecheta, M. Hafidz Omar
Publikováno v:
Climate Risk Management, Vol 32, Iss , Pp 100295- (2021)
Modeling of extreme weather conditions is an important issue in environmental risk assessment, management and protection. In this paper, Annual and monthly maxima of daily temperature and rainfall data dating from 1901–2016 and 1950–2018 are char
Externí odkaz:
https://doaj.org/article/7d1179373e3447a686dc8c391b9744f9
Publikováno v:
Austrian Journal of Statistics, Vol 49, Iss 1 (2020)
Judgement ranking in ranked set sampling (RSS) and its variations depends on the ability of an observer to rank a set of objects according to the study variable without doing any actual measurement. In practice, and in some variations of RSS, it is h
Externí odkaz:
https://doaj.org/article/5c384ae4255847ef964c13790f1a33d5
Publikováno v:
Symmetry, Vol 13, Iss 2, p 189 (2021)
(1) Background: The literature discusses the inverse Maxwell distribution theoretically without application. Control charting is promising, but needs development for inverse Maxwell processes. (2) Methods: Thus, we develop the VIM control chart for m
Externí odkaz:
https://doaj.org/article/eed633fb0b004a6fae90fef7034af3c4
Publikováno v:
Revista Colombiana de Estadística, Vol 36, Iss 2, Pp 209-219 (2013)
The distribution of the linear combination of two chi-square variables is known if the variables are independent. In this paper, we derive the distribution of positive linear combination of two chi-square variables when they are correlated through a
Externí odkaz:
https://doaj.org/article/35ceae874c1842dab232514e5a250d1f
Autor:
ANWAR H. JOARDER, M. HAFIDZ OMAR
Publikováno v:
Kuwait Journal of Science, Vol 40, Iss 2 (2013)
The exact distribution of the sum of two chi-square random variables is known if the variables are independent. We derive the exact distribution of the sum of two correlated chi-square variables when they are correlated through a bivariate chi-square
Externí odkaz:
https://doaj.org/article/10c8b3ebc2b44785863e5fe66020aa31
Autor:
Anwar H. Joarder, M. Hafidz Omar
Publikováno v:
Bulletin of the Malaysian Mathematical Sciences Society. 45:505-522
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d77f3e2a38392bd27f93a8b5e6751f4
https://doi.org/10.1007/s40840-022-01373-2
https://doi.org/10.1007/s40840-022-01373-2