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8.6 Exercise 7

Avg difficulty 2.5
  1. If data are normally distributed with mean 8 and standard deviation 2, what percent of the data falls between 4 and 12?
  2. If data are normally distributed with mean 25 and standard deviation 5, what percent of the data falls between 20 and 30?
  3. If data are normally distributed with mean 200 and standard deviation 15, what percent of the data falls between 155 and 245?

OpenStax Contemporary Mathematics, 8.6 The Normal Distribution, exercise 7

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Adapted from Contemporary Mathematics © 2023 Rice University. Licensed under CC BY 4.0. Source: Contemporary Mathematics. Imported at revision fa7c1a1.