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 Can I Use Excel to Test for the Difference Between Dependent Means?

How Can I Use Excel to Test for the Difference Between Dependent Means?

We are using the following example to examine the difference between the means of the same group of adults, tested at two different times. The research hypothesis is that weight lifting makes a difference to bone density. The t-test is a one-tailed test at the.05 level of significance. These 15 female adults all participated in a weight-training program, with the initial assessment of bone density taking place in the fall and a second assessment taking place in the spring. It is expected that the second testing will show an increase in bone density. The dependent or outcome variable is a rating of bone density from 1 to 5, with 5 being ...

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