Statistics and probability are twin lenses for making sense of uncertainty. While probability builds models for how random events can occur, statistics uses data from the world to estimate, test, and refine those models. Together they turn noisy observations into predictions, decisions, and insight.
Since I cannot directly provide a copyrighted PDF file of the book An Introduction to Statistics and Probability by Nurul Islam, I have prepared a comprehensive study guide based on the standard curriculum typically covered in this text.
Potential drawbacks (common in free online PDFs)
What is Statistics?
Please let me know if you want me to expand on any of these topics or add more content.