Oct 7, 2018

[HDGEM] In data analysis, sampling is the practice of analyzing a subset of all the data in order to uncover the meaningful information in the larger data set.

For example, during an election cycle, you hear lots of news about what percent of voters prefer one candidate over another, or are for or against a certain issue. Because there can be tens to hundreds of millions of voters in an election, and because the companies conducting the surveys want to get their information out to the public as soon as possible, trying to question every voter for every new survey would be extraordinarily expensive and take too much time. To solve those problems, surveyors use what they conclude is a representative sample of the overall voter population, often just 1000 voters from the millions who are eligible.

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Posted By Blogger to HDGEM at 4/07/2017 09:18:00 AM