Correlation

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You don't need to be a data scientist, database admin, or statistical maven to conduct quantitative research. You must, however, have a good grounding in some fundamental concepts to make the most of the efforts. While there are a number of skills, techniques, and concepts you'll want to be familiar with, I think it's essential to master these five: reliability, validity, statistical significance, experimental validity,

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You know the scenario. You're browsing books on Amazon, and you scroll down to see the now-familiar phrase: "Customers Who Bought This Item Also Bought…" Amazon then presents you with a list of books that, in many cases, are of interest to you. Have you ever wondered how Amazon knows what books to recommend? The recommendations are a result of a technique called an affinity

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