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Back to 7.3 Using the Central Limit Theorem

7.3 Exercise 30

Avg difficulty 2.5


Use the following information to answer the next five exercises: The length of time a particular smartphone's battery lasts follows an exponential distribution with a mean of ten months. A sample of 64 of these smartphones is taken.

Find the interquartile range (IQR) for the mean amount of time 64 batteries last.

OpenStax Statistics, 7.3 Using the Central Limit Theorem, exercise 30

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