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Back to 6.1 The Standard Normal Distribution

6.1 Exercise 56

Avg difficulty 2.5

Use the following information to answer the next two exercises: The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.3 days and a standard deviation of 2.1 days.

What is the z-score for a patient who takes ten days to recover?

  1. 1.5
  2. 0.2
  3. 2.2
  4. 7.3

OpenStax Introductory Statistics 2e, 6.1 The Standard Normal Distribution, exercise 56

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Adapted from Introductory Statistics 2e © 2023 Rice University. Licensed under CC BY 4.0. Source: Introductory Statistics 2e. Imported at revision 50ec917.