Monitoring Mortality Caused by COVID-19 Using Gamma-Distributed Variables Based on Generalized Multiple Dependent State Sampling

Comput Math Methods Med. 2021 Apr 22;2021:6634887. doi: 10.1155/2021/6634887. eCollection 2021.ABSTRACTMore recently in statistical quality control studies, researchers are paying more attention to quality characteristics having nonnormal distributions. In the present article, a generalized multiple dependent state (GMDS) sampling control chart is proposed based on the transformation of gamma quality characteristics into a normal distribution. The parameters for the proposed control charts are obtained using in-control average run length (ARL) at specified shape parametric values for different specified average run lengths. The out-of-control ARL of the proposed gamma control chart using GMDS sampling is explored using simulation for various shift size changes in scale parameters to study the performance of the control chart. The proposed gamma control chart performs better than the existing multiple dependent state sampling (MDS) based on gamma distribution and traditional Shewhart control charts in terms of average run lengths. A case study with real-life data from ICU intake to death caused by COVID-19 has been incorporated for the realistic handling of the proposed control chart design.PMID:33968159 | PMC:PMC8083828 | DOI:10.1155/2021/6634887

Source: Computational and Mathematical Methods in Medicine - May 10, 2021 Category: Statistics Authors: Muhammad Aslam G Srinivasa Rao Muhammad Saleem Rehan Ahmad Khan Sherwani Chi-Hyuck Jun Source Type: research