What is the chance it was the virus that did it (and thus a reboot will destroy the files!)?
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
An unattended laptop computer has been infected with a virus which, if not removed by the protection program, has a 94% chance of infiltrating the operating system and destroying all stored files. To do this, it will institute a shutdown and require a user reboot. The laptop’s virus protection program, unfortunately, is outdated and thus has only a 68% chance of removing the virus once it has infected the computer. Further, to complete removal, the protection program will also need to institute a shutdown and require a user reboot. The computer has also been set to institute a shutdown on its own, if left unused for an hour, in order to conserve battery power.
Suppose the laptop’s owner returns after 60 minutes to find it has shutdown. What is the chance it was the virus that did it (and thus a reboot will destroy the files!)?
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