estatística

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Population, sample and estimators: learn simple random, stratified and systematic sampling, with exa...

Leon

Found strange points in your data? Learn what outliers are, what to do with them and how to identify...

Leon

Learn to standardize a normal variable with z = (x − μ)/σ and use the standard normal table to calcu...

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From Bernoulli and the binomial to the central limit theorem: how the normal distribution arose, fro...

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Fundamental counting principle, permutations with and without repetition, arrangements and combinati...

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Statistical models, the origins of probability, the heuristics that fool us and the Monty Hall probl...

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How to describe the link between two variables with a straight line: slope, intercept, least squares...

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Scatter diagrams, linear correlation and Pearson's coefficient: how to calculate it, how to interpre...

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The first measure of the relationship between two variables: what covariance is, two ways to calcula...

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How to study two variables together and why correlation is not causation: common cause, reverse caus...

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Once we know where the data sit and how spread out they are, we ask: are they symmetric? Pearson ske...

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Variance and standard deviation for raw and grouped data, population vs. sample (n or n − 1), proper...

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How to calculate the mean, mode and median for raw and grouped data, when to use each one, and what ...

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How to build a frequency distribution: classes, limits, width, Sturges' rule, relative and cumulativ...

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A datum is the observed value; a variable is what is measured. See the types (nominal, ordinal, disc...

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What is statistics, and what is the difference between data, information and knowledge? Learn the py...

Leon

How SPC warns you when a process goes out of control: common and special causes, chart types and how...