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Welcome to eGyanKosh’s comprehensive study material for IGNOU 2025, focusing on Unit-9: Measures of Variation and Skewness. This unit explores essential statistical concepts that are vital for understanding data distributions. In this resource, you’ll find in-depth explanations of measures such as variance, standard deviation, range, and skewness, along with practical examples and exercises to enhance your learning experience. Whether you’re a student looking to deepen your grasp of these fundamental topics or preparing for your exams, our free downloadable materials are designed to support your academic journey and empower you with the knowledge needed to excel in your studies. Dive into the world of statistics and unlock the secrets of data analysis with eGyanKosh!