A computer system uses passwords consisting of the lowercase letters (az) and the integers (09). There are
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(a) Suppose that 8000 of the users have six-character passwords. What is the mean and standard deviation of the number of attempts required before the hacker selects a legitimate password?
(b) Suppose that 2000 of the users have three-character passwords. What is the mean and standard deviation of the number of attempts required before the hacker selects a legitimate password?
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Related Book For
Introduction to Statistical Quality Control
ISBN: 978-1118146811
7th edition
Authors: Douglas C Montgomery
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