Week 2 Homework
Score for this quiz: 11 out of 11
Correct answer
!
Question 1
pts
You could also have used a
binomial distribution argument to
solve this problem, i.e.,
c. 0.576
d. 0.6
e. I'm from The University Of Georgia. Is the answer -3?
The answer is (b). To see why, note that
, You could also have used a binomial distribution argument to solve this problem,
i.e.,
Correct answer
!
Question 2
pts
(Lesson 2.5: Probability Basics.) Toss 3 dice. What's the probability that a "4" will come up exactly
twice?
a. 5/72
Write out every possible outcome explicitly, or use the following binomial argument: Let denote
the number of times a "4" comes up. Clearly,
b. 1/2
c. 13/16
d. 1/8
(a). Write out every possible outcome explicitly, or use the following binomial argument: Let
denote the number of times a "4" comes up. Clearly,
Correct answer
!
Question 3
pts
(Lesson 2.7: Great Expectations.) Suppose that is a discrete random variable having
with probability 0.2, and with probability 0.8. Find .
Correct answer