Question

7) Suppose that 15% of all CI students ride a bicycle to campus.
a) Is the 15% number a parameter or a statistic? Explain briefly.
Suppose that Josiah takes a random sample of 80 CI students, and Kellen take a random sample of
160 CI students.
b) Who is more likely to find that more than 20% of his/her sample rides a bicycle to campus?
Explain briefly.
c) Suppose that you take a random sample of CI students, and you want to use the Central Limit
Theorem to conduct probability calculations involving the proportion of your sample who ride
a bicycle to campus. How large would your sample have to be, in order for using the Central
Limit Theorem to be valid?

Answer 1