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.

Transcribed Image Text:

6.6 6.6 6.6 6.6 6.6 6.6 6.7 6.7 6.7 6.8 6.9 6.9 6.9 6.9 7.0 7.0 7.0 7.0 7.1 7.1 7.1 7.2 7.2 6.7 6.7 6.8 6.8 7.5 7.6 7.7 7.8 7.8 7.8 7.9 7.9