In an increasingly data-driven world, it is more important than ever for students as well as professionals to better understand basic statistical concepts. 100 Questions (and Answers) About Statistics addresses the essential questions that students ask about statistics in a concise and accessible way. It is perfect for instructors, students, and practitioners as a supplement to more comprehensive materials, or as a desk reference with quick answers to the most frequently asked questions.

How Do z Scores Relate to Hypothesis Testing?

How Do z Scores Relate to Hypothesis Testing?

The most important reason why inferential statistics are such powerful tools is that they allow us to use a representative sample taken from a population and infer, from the results of a test or measure of that sample, something about the population. That’s big.

But also very important is the fact that we can assign probabilities to any outcome (such as, but not limited to, z scores) taken from a sample. Then, using a set of rules, we can decide whether that outcome is likely enough for us to attribute the finding to some known event (such as the use of a treatment to help children read better) or we must simply attribute it to chance or ...

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