More on ANOVA

Read this chapter and complete the questions at the end of each section. While these sections are optional, studying ANOVA may help you if you are interested in taking the Saylor Direct Credit exam for this course.

Power of Within-Subjects Designs Demonstration

Answers

  1. High correlations can result in much higher power than lower correlations. They do this by lowering the mean square error.

  2. High variance increases the error term and lowers power.

  3. The more different the population means, the bigger the effect and the higher the power.

  4. Since the probability is caluclated in only one tail, a one-tailed test results in a lower probability value.