Knowing the future: from magic to tarot cards, from astrology to calculators

One of the first words we associate with the word future turns out to be uncertainty. In the past we relied on vicars of deities, oracles, drugs, or a mixture, to get some answers about the future. Today, being in the scientific age, closing the Comtian mention, we have various and different ways of measuring uncertainty, in a methodical, verifiable, repeatable way. In chemistry ...

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How to recognize a computer scientist doing statistics and why you need to be careful

Introduction One of the goals of statistics lies in explaining the variability of a phenomenon of interest by means of a mathematical expression, i.e., an equation called a model, made up of an objective (dependent) variable and explaining (explanatory, independent) variables. If the target variable has no variability, then we do not have a variable but a constant. E ...

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Are you right or wrong? How statistics, through testing and significance, allows us to evaluate opinions, hypotheses

Suppose you have an opinion. Let us define opinion otherwise I do not establish common ground: a word that comes from Latin and means a concept that one or more persons form concerning particular facts, phenomena, manifestations, when, lacking a criterion of absolute certainty for judging their nature (or their causes, qualities, etc.), they propose ...

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