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It's even more important these days that your computer be protected by a firewall. There are criminal elements lurking in the shadows of cyberspace who send out probes to detect unprotected PCs. Once a vulnerable computer is found, these criminals install software that assists them in committing identity theft and fencing stolen IDs. They also defraud online advertisers by using these zombie computers to visit pay-per-click ads.
Nominal Data
Refers to data classified into categories that cannot be ordered in any meaningful way, such as types of fruit or colors.
Chi-squared Test
A numerical method employed to ascertain whether a notable discrepancy exists between the anticipated frequencies and the actual frequencies across one or several categories.
Qualitative Data
Data that is descriptive and conceptual, often categorized based on qualities and characteristics that are not numerical.
Chi-squared Test
An analytical test designed to evaluate whether there's a significant discrepancy between frequencies observed and those anticipated in various categories.
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