A large, public university wants to determine if a majority of its students use iPhones.The university randomly selects 122 of its students and asks each student whether or not they use an iPhone.Eighty (80) of these 122 students use an iPhone.

A. What is the population for this study?

B. What is the sample for this study?

C. The variable of interest for this study is: (CIRCLE the appropriate choice)

(a)Qualitative Ordinal (b)Qualitative Nominal(c)Quantitative

D. Do the data provide evidence that more than 50% of all students at the university carry an iPhone?Use = 0.05.

E. Is the procedure used in part D valid?Justify your answer in the context of the problem.

F. How many students should be selected to estimate the proportion of students that use an iphone with 95% confidence and within a margin of error of 2%?Note that you may use the data presented in the problem as an initial (pilot) estimate of this proportion