scholarly journals A Comparison of Estimation Methods for Gompertz Flexible Weibull Distribution

2021 ◽  
Vol 14 (3) ◽  
pp. 887-897
Author(s):  
Caner TANIŞ ◽  
Kadir KARAKAYA
2022 ◽  
Vol 7 (2) ◽  
pp. 2820-2839
Author(s):  
Saurabh L. Raikar ◽  
◽  
Dr. Rajesh S. Prabhu Gaonkar ◽  

<abstract> <p>Jaya algorithm is a highly effective recent metaheuristic technique. This article presents a simple, precise, and faster method to estimate stress strength reliability for a two-parameter, Weibull distribution with common scale parameters but different shape parameters. The three most widely used estimation methods, namely the maximum likelihood estimation, least squares, and weighted least squares have been used, and their comparative analysis in estimating reliability has been presented. The simulation studies are carried out with different parameters and sample sizes to validate the proposed methodology. The technique is also applied to real-life data to demonstrate its implementation. The results show that the proposed methodology's reliability estimates are close to the actual values and proceeds closer as the sample size increases for all estimation methods. Jaya algorithm with maximum likelihood estimation outperforms the other methods regarding the bias and mean squared error.</p> </abstract>


2022 ◽  
Vol 2022 ◽  
pp. 1-13
Author(s):  
Mi Yantian ◽  
Zubair Ahmad ◽  
Ibrahim Alkhairy ◽  
Hassan Alsuhabi ◽  
Morad Alizadeh ◽  
...  

Online marketing refers to the practices of promoting a company’s brand to its potential customers. It helps the companies to find new venues and trade worldwide. Numerous online media such as Facebook, YouTube, Twitter, and Instagram are available for marketing to promote and sell a company’s product. However, in this study, we use Instagram as a marketing medium to see its impact on sales. To carry out the computational process, the approach of linear regression modeling is adopted. Certain statistical tests are implemented to check the significance of Instagram as a marketing tool. Furthermore, a new statistical model, namely a new generalized inverse Weibull distribution, is introduced. This model is obtained using the inverse Weibull model with the new generalized family approach. Certain mathematical properties of the new generalized inverse Weibull model such as moments, order statistics, and incomplete moments are derived. A complete mathematical treatment of the heavy-tailed characteristics of the new generalized inverse Weibull distribution is also provided. Different estimation methods are discussed to obtain the estimators of the new model. Finally, the applicability of the new generalized inverse Weibull model is established via analyzing Instagram advertising data. The comparison of the new distribution is made with two other models. Based on seven analytical tools, it is observed that the new distribution is a better model to deal with data in the business, finance, and management sectors.


Author(s):  
T. Kamio ◽  
M. Iida ◽  
C. Arakawa

This paper mentions the difference of estimation methods for the Weibull distribution using the wind data that were measured at more than 300 locations to clarify the wind characteristics in a complex terrain. As the result, the Weibull distribution function is approximated the experimental wind data by the non-linear fitting method rather than the linear fitting method. Then the numerical site calibration with MASCOT which is the non-linear numerical wind prediction model and WaSP are run out on a complex terrain in Japan.


2016 ◽  
Vol 108 ◽  
pp. 322-335 ◽  
Author(s):  
Kasra Mohammadi ◽  
Omid Alavi ◽  
Ali Mostafaeipour ◽  
Navid Goudarzi ◽  
Mahdi Jalilvand

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