Statistical Inference I: J. Lee
Assignment 1
Problem 1. An exam has 10 multiple choice questions where each question has 5 possible answers.
(a) If student goes into exam completely unprepared and guesses on all 10, what is the probability of
getting at l
Statistical Inference I: J. Lee
Assignment 2 Solution Notes
Problem 1.
(a) By considering each possible outcome, we see that the possible
probability function is given by
2
(2)
= 0.1
(52)
(21)(21)
= 0.4
(52)
(2)
25 = 0.1
(2)
p(x) = P (X = x) =
1 2
(1)
Statistical Inference I: J. Lee
Assignment 1 Solution Notes
Problem 1. Solved in class.
Problem 2.
(a) either A or B occurs; P (A B) = P (A) + P (B) P (A B) = 0.35 + 0.51 0 = 0.86.
(b) A occurs but B does not; P (A B c ) = P (A) = 0.35, since A B c .
(c)
Statistical Inference I: J. Lee
Assignment 2
Problem 1. In your pocket, you have 1 dime, 2 nickels, and 2 pennies. You select 2 coins at random
(without replacement). Let X represent the amount (in cents) that you select from your pocket.
(a) Give (explic