In a perfect world, we want the sample to be representative of the population. If it were in fact perfectly representative, we might call it a representative sample, because the information we collect about the sample would “scale up” to the population.
Read MoreIf we want to put to good use everything we’ve learned so far about data, we’ll need to know how to run studies in a way that gives us good, reliable data. In this section we’ll talk about different kinds of studies we can use to collect data, including observational studies and experiments.
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