Скачать или смотреть Inferential Statistics – From 30 People to the Whole Planet, P Values & Confidence Intervals

How can a poll of just 1,000–2,000 people predict an election with millions of voters?
How can a drug trial with 5,000 patients prove something for 8 billion humans?
The answer is inferential statistics — the branch of math that lets us go from a tiny, carefully chosen sample to reliable conclusions about the entire population.
• Why sample means form a bell curve (the secret behind every poll)
• What a 95 % confidence interval really means (and the one sentence everyone gets wrong)
• Where the “±3 % margin of error” in polls really comes from
• The four core ideas that power elections, medicine, A/B testing, AI research, and all of modern science
• The limits: when inferential stats fail and how to spot bad studies
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