A Canadian college, with 5 programs (30% business, 30% engineering, 20% health, 15% liberal arts, 5% science) and 2 campuses (Toronto and Montreal), has a total of 20,000 students.Theresearchers at the collegewould like to conduct aresearchon the topic of online learningin order to improve the support for students, by using the methods ofonline surveyandonline interviews.

a)Assume that the sample size for thesurveyis determined to be1,000 students.Explain 4 ways of selecting a probability sample of 1,000 from the list of 20,000 students, and the advantages and disadvantages of each design. (1.5 marks)

Explain how to determine sample size for probability sampling designs (0.75 mark).Explain what it means for the survey by "the margin of error is +/- 3%, 19 times out of 20 (95% confident)" (0.75 mark)