Statistics
Probability Distributions
A probability distribution describes how probabilities are distributed over values of a random variable.
Key Formulas
Normal PDF
The bell curve.
Key Concepts
Mean and varianceNormal distributionBinomial distributionStandard deviation
Worked Examples
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Probability
Probability measures how likely an event is to occur, ranging from 0 (impossible) to 1 (certain).
Regression
Regression analysis estimates relationships among variables, most commonly fitting a line to data.
Hypothesis Testing
Hypothesis testing uses sample data to evaluate claims about a population.