For Exercises 23–35, do the following:

  1. Provide the null and alternative hypotheses.
  2. Describe the two ways a correct decision could be made in the context of the problem.
  3. Describe what a Type I error would mean in the context of the problem.
  4. Describe what a Type II error would mean in the context of the problem.

Question 9.28

28. Americans' Height. Dr. Richard Steckel, professor of economics and anthropology at The Ohio State University, wants to investigate whether the mean height of Americans has changed from 175 centimeters.2