Statistical studies. Refer to given Figure. For each of the items below, explain what part of the figure they represent. Give reasons for your answers.
(a) Calculating the average quiz score of a sample of students.
(b) Who will win the next election for student body president?
(c) Is a new treatment for ACL knee surgery in college athletes better than the standard treatment with respect to a test of how well the knee works six months after the surgery?
(d) The study concluded that a flu vaccine can prevent adults from contracting the flu.
