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Completely rewritten: probability and statistical inference — probability rules, counting, Bayes' theorem, discrete and continuous distributions, the central limit theorem, confidence intervals and hypothesis tests — with drawings, worked examples, practice questions and z, t and chi-square tables. Now in 8 languages: English, Spanish, Portuguese, French, German, Arabic, Hindi and Indonesian.
Probability, distributions, confidence intervals and hypothesis tests explained
Probability and Statistics takes you from the rules of probability to statistical inference, with clear explanations, original drawings, worked examples and practice questions. What's inside • Probability: sample spaces, addition and multiplication rules, conditional probability, independence, Bayes' theorem with tree diagrams, permutations and combinations • Discrete distributions: random variables and expected value, binomial, Poisson and geometric distributions • Continuous distributions: uniform and exponential, the normal distribution, the standard normal and z-scores, the normal approximation • Sampling distributions: the sampling distribution of the mean, the central limit theorem, sample proportions • Confidence intervals: z and t intervals for means, intervals for proportions, choosing a sample size • Hypothesis tests: p-values, type I and II errors and power, z and t tests, tests for proportions, two-sample and paired tests • Centre and spread: mean, median, quartiles, box plots, standard deviation and z-scores • Formula sheet and z, t and chi-square tables Made for studying • Typeset formulas with every symbol explained • Worked examples with full steps; all numbers and table values were computed and checked • Practice questions with tap-to-reveal answers • Search across all topics • Dark mode • Works offline, with no account needed • Available in 8 languages: English, Español, Português, Français, Deutsch, العربية, हिन्दी and Bahasa Indonesia For high-school and college students taking a probability or statistics course. This app is an independent study aid.