A nutritionist wanted to determine which exercise is best for muscle growth. She randomly
selected ten people and randomly assigned each one to complete one of ten different exercises
each day. Two weeks after this treatment, she measured the muscle growth of the people; the
exercise that maximized muscle growth was recommended as the best method. Which of the
following best describes why this is not a well-designed experiment?
a. The people were not randomly selected.
b. Exercises were not randomly assigned to the people.
c. Each person did not receive all ten exercises.
d. Only two treatments should be used in an experiment.
Each exercise was used on only one person.
e.
