Statistics › Section F · The normal distribution › Topic F.2

Using the normal distribution

Nobody measures a child's height in z-scores. Real quantities come with real units, their own mean and SD - and a three-step pipeline connects them to the standard-normal table, in both directions.

In this topic

  • Real normals, real units
  • The recipe
  • Worked example: IQ scores
  • Worked example: between two heights
  • Working backwards: from area to value
  • Worked example: the top 10% of IQ
  • Worked example: a bakery's tallest loaves
  • Checking that the data are normal
  • Why the normal is everywhere
  • Common mistakes to avoid
  • Key takeaways

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