Statistics & Probability

Mean, mode, median, tables, charts, probability and data interpretation.

3articles

Mesa de estudo com uma árvore de probabilidades desenhada em papel, marcadores coloridos sobre os ramos, calculadora e quadro ao fundo com notação de probabilidade condicional.

Statistics & Probability12/09/20266 min read

Conditional probability tree: when to multiply, add, and renormalize without memorizing formulas

Learn to read a conditional probability tree: multiply paths, add alternatives, and renormalize after receiving new information.

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Mesa de estudos com caderno mostrando fórmulas de média simples e ponderada, tabela de notas e frequências, calculadora e material do Enem.

Statistics & Probability11/09/20266 min read

Simple or weighted average? How to spot hidden weights in tables and Enem questions

Learn when to use a simple or weighted average, especially when frequencies, group sizes, and percentages act as weights.

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Notebook exibindo três boxplots coloridos para grupos A, B e C em uma mesa de estudos com livros de estatística, probabilidade e matemática.

Statistics & Probability11/09/20267 min read

Boxplots without memorizing: how to read the median, quartiles, interquartile range, and outliers in problems

Learn to interpret boxplots step by step, compare location and spread across groups, and recognize possible outliers without confusing a statistical flag with an error.

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