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Table Of Contents
CompTIA Data+: DAO-001 Certification Guide
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Frequencies and percentages are some of the simplest descriptive statistics, but they are useful nonetheless. This is why they are commonly part of EDA. You get to know the exact makeup of a variable. They can be used in various ways, but are most often applied to a single variable to understand how it is composed. More often than not, this one variable is categorical, so this is a great tool for your qualitative variables.
It should be noted that these can be used for multiple variables at the same time, but how complex they are increases exponentially with every variable added.
We can throw around all the fancy terms we want, but at the end of the day, a frequency is just a count of occurrences. You are literally just counting how many times a specific value occurs within a variable. There are many ways to do this, depending on the data analysis tools you are using, but for this exam, you must calculate it by hand. The...