Prepare confidently for the Indian Statistical Service (ISS) 2025 examination with this comprehensive collection of solved Statistics questions and explanations. Each problem is presented with its correct option, detailed step-by-step reasoning, and conceptual clarity—covering estimators, testing, consistency, sufficiency, and UMVUE topics. The post includes Questions 1 to 15 from advanced inference and hypothesis testing areas that commonly appear in ISS, ISI, and other pos