The following data represents a selection of 40 earthquake depths: 6.6, 2.2, 18.5, 7.0, 13.7, 5.4, 5.3, 5.9, 4.7, 14.5, 2.0, 14.8, 8.1, 18.6, 4.5, 17.7, 15.9, 15.1, 8.6, 5.2, 15.3, 5.6, 10.0, 8.2, 8.3, 9.9, 13.7, 8.5, 8.2, 7.9, 17.2, 6.1, 13.7, 5.7, 6.0, 17.3, 4.2, 14.7, 15.2, 3.3

a. Find the mean, median, and mode of the data set.

b. Find the standard deviation and variance of the data set.

c. Find the z-score for a depth of 9.9. Would this be considered unusual?

d. Find the 5-number summary and make a box plot for the data set