Question 17 (1 point) It has been estimated that 30% of post-secondary students switch majors within their first two years of studies. At a certain 40,000 student-body school, 2,500 third year students were surveyed. You wish to determine the likelihood that 700 or less of the surveyed students have switched their major. State the "p-bar" value. Question 18 (1 point) Last month Mr. Stats sent 850 packages by courier. He would like to know the average cost of sending a package. A random selection of 35 invoices averaged $10.50, and have a standard deviation of $1.22. State the "N" value. Question 19 (1 point) The current town mayor (of 50,000 people) is considering campaigning again to be mayor. The first time, she received 70% of the votes. You are interested in determining the likelihood that 400 of 500 surveyed town residents say they would vote for the mayor. State the "n" value