Summary
Contents
Subject index
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.
What Is the Relationship Between Reliability and Validity?
What Is the Relationship Between Reliability and Validity?
As you know by now, reliability is the quality of a test that speaks to its consistency and stability. If a test is reliable, several different administrations will result in a similar level of performance relative to the entire group’s performance. In addition, you know that validity is the quality of a test that speaks to its veracity, truthfulness, or authenticity. If a test is valid, it assesses what the test was designed to assess.
But just as important as these two ideas to ensuring that an assessment tool works as it should is the relationship between reliability and validity.
It is entirely possible to have a test that is reliable but not valid. However, you cannot have ...
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