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The Normal Distribution
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Bell curves and normal notation

Bell curves and normal notation

Bell curve with mean mu at the centre, mu minus sigma and mu plus sigma marked, and equal left and right areas showing symmetry

A normal distribution is a continuous model with a symmetric bell-shaped curve. Probabilities are areas under the curve, so the total area is 1 and the curve is balanced about its centre.

The Normal Distribution Lesson

  1. A Level
  2. /Maths
  3. /The Normal Distribution

Step-by-step lessons covering Edexcel A Level Maths The Normal Distribution for A Level Maths. Each lesson breaks down 3.1 The Normal Distribution, 3.2 Finding Probabilities for Normal Distributions, 3.3 The Inverse Normal Distribution Function, 3.4 The Standard Normal Distribution, 3.5 Finding the mean and standard deviation, 3.6 Approximating a Binomial Distribution, and 3.7 Hypothesis Testing with the Normal Distribution, then works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Build fluency with the core pure algebra and calculus toolkit early, since almost every mechanics and statistics topic on the course depends on it.