Analyzing meteorological data with bootstrap-based confidence intervals for Poisson-Rani distribution parameter estimation
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Abstract
The Poisson distribution is commonly used when events are assumed to be independent and occur at a consistent rate. This may not be generally applicable, and the Poisson distribution is not appropriate in situations where the underlying rate of occurrence displays variability. A mixed Poisson distribution such as the Poisson-Rani distribution permits the rate parameter to be random instead of constant. Bootstrap-based confidence intervals (CIs) were developed for the Poisson-Rani distribution parameter in this study. The percentile bootstrap (PB), basic bootstrap (BB), and bias-corrected and accelerated (BCa) bootstrap methods were compared for empirical coverage probabilities and expected lengths by the Monte Carlo simulation using the RStudio program with sample sizes of 10, 30, 50, 100, 500, and 1,000. The parameter values were set at 0.1, 0.3, 0.5, 0.8, 1, 1.5, and 2 with 1,000 replications. The simulation results suggested that the bootstrap-based CIs required improvement to attain the nominal confidence level for small sample sizes. No significant differences were detected in the performances of bootstrap-based CIs when evaluating large sample sizes, with the BCa bootstrap CI exhibiting superior performance compared to the others. The application of bootstrap-based CIs to meteorological data yielded comparable results to the simulation study.
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