Referring to the earthquake data in Exercise 2.20, (a) Find the sample mean and standard deviation. (b)

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Referring to the earthquake data in Exercise 2.20,
(a) Find the sample mean and standard deviation.
(b) What proportion of these observations lies between x ± 2 s?


Data from in Exercise 2.20

In a recent year, 35 sites around the world experienced earthquakes of magnitude greater than 6.5.

Construct a histogram using equal-length intervals starting with (6.5, 6.8 ], where the right-hand endpoint is included but not the left-hand endpoint.

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Statistics Principles And Methods

ISBN: 9781119497110

8th Edition

Authors: Richard A. Johnson, Gouri K. Bhattacharyya

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