Refer to the 2010 CSI Computer Crime and Security Survey, Exercise 2.13. Recall that the percentage of monetary losses attributable to malicious insider actions was recorded for 144 firms. The histogram for the data is reproduced below.
a. Based on the histogram, what (approximate) monetary loss value represents the 30th percentile?
b. Based on the histogram, what (approximate) monetary loss value represents the 95th percentile?

Data from Exercise 2.13

Recall that 351 organizations responded to the survey on unauthorized use of computer systems. One of the survey questions asked respondents to indicate the percentage of monetary losses attributable to malicious actions by individuals within the organization (i.e., malicious insider actions).

 

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0.4 0.35 - 0.3 0.25 - 0.2 - 0.15 - 0.1- 0.05 - 20 40 60 80 100 Monetary Loss (%) SS Relative Frequency