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What is it about?

This is a practical tool for statistical modeling and parameter estimation. It supports inputting sample data and selecting a distribution type (Bernoulli, Poisson, or Normal). It automatically calculates the maximum likelihood estimate (MLE), plots the likelihood function curve, and highlights the optimal estimate. Built-in PDF export and history saving and viewing functions facilitate teaching demonstrations, data analysis, and academic research. With a clear interface and simple operation, it is an ideal tool for learning and applying the maximum likelihood method.