Statistics is a branch of mathematics that deals with the collection, analysis, interpretation, presentation, and organization of data. It provides methodologies for making inferences and predictions about populations based on sample data, enabling informed decision-making. Key concepts in statistics include descriptive statistics, which summarize data features, and inferential statistics, which use sample data to draw conclusions about larger groups. Statistics is widely applied in various fields such as science, economics, social sciences, and medical research, facilitating the understanding of complex data and supporting evidence-based conclusions.