GCSE Statistics - Normal Distribution

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Normal Distribution:

  • A curve for a normal distribution looks like this: 


  • It is symmetrical.
  • It's mean, median and mode all line on the line of symmetry.
  • The width of the curve shows how spread out the data is.
  • In a normal distribution, 68% of the values are within one standard deviation of the mean.
  • 95% of the values are within two standard





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