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Back to 7.3 Using the Central Limit Theorem

7.3 Exercise 5

Avg difficulty 2.5

Use the information in the example, but use a sample size of 55 to answer the following questions.

  1. Find P( x ¯ \bar{x} < 7).
  2. Find P(Σx > 170).
  3. Find the 80th percentile for the mean of 55 scores.
  4. Find the 85th percentile for the sum of 55 scores.

OpenStax Statistics, 7.3 Using the Central Limit Theorem, exercise 5

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Adapted from Statistics © 2022 Rice University. Licensed under CC BY 4.0. Source: Statistics. Imported at revision 7dea80a.