Learning Objectives

After reading this chapter, you should be able to do the following:

  • Write null and research hypotheses using population parameters and words
  • Compute a z for a sample mean
  • Determine whether or not you should reject the null hypothesis
  • Compute and interpret the effect size (d) of a study
  • Summarize study results using American Psychological Association (APA) style
  • Identify examples of Type I error, Type II error, and statistical power
  • Provide a detailed description of a p value, critical value, and obtained value