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In "The normal and t-distributions" a sampling distribution, the t-distribution, was introduced. In "Making estimates" you learned how to use the t-distribution to make an important inference, an interval estimate of the population mean. Here you will learn how to use that same t-distribution to make more inferences, this time in the form of hypothesis tests. Before we start to learn about those tests, a quick review of the t-distribution is in order.
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