In research, examining variables is a major part of a study. There are three main types of variables: continuous variables can take any numerical value and are measured; discrete variables can only take certain numerical values and are counted; and categorical variables involve non-numeric groups or categories. To unlock this lesson you must be a Study.com Member.
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Home Thom. Thom Hartmann is a progressive national and internationally syndicated talkshow host whose shows are available in over a half-billion homes worldwide. He's the New York Times bestselling, 4-times Project Censored Award winning author of 24 books in print in 17 languages on five continents.