In: Statistics and Probability
Problem(1) (a) Consider the (random) experiment of throwing THREE coins together. Let S denote the sample space. List the elements in S.
(b) If HEAD comes up, you win $2 dollars; you lose $1 dollar if TAIL shows up. Let X be the random variable that corresponds to the money you win (a positive value) or lose (a negative value). What are the values that the random variable X takes?
(c) Suppose that the coin is made and thrown fairly. Find P[X = 2].
(d) Find E[X].
(e) Find E[X2 ].
(f) Find V ar[X].