Exam 2
Instructions
This test is 120 minutes. You're allowed two cheat sheets (4 sides total). You will find tables
attached on the last page of this exam (scroll to the end). All questions are worth 2.5 points.
You’re allowed the following items:
• Pencil / pen and scratch paper.
• A reasonable calculator.
• Two cheat sheets (4 sides total).
• Tables. (Available at the end of test questions too)
Note that you are not allowed to use Arena (or any other software), even though I'm asking
questions about it.
Good luck! I want you to make this test sorry that it ever tried to mess around with you!!!
If you run into a technical issue during your exam, please contact the appropriate
provider:
Canvas: Call 1-877-259-8498 or use the
chat http://cases.canvaslms.com/liveagentchat?chattype=student (Links to an
external site.)
HonorLock: Use the chat function in the HonorLock window.
,BEFORE YOU TAKE THIS QUIZ
You will need to complete verification.
This quiz is no longer available as the course has been concluded.
Attempt History
Attempt Time Score
LATEST Attempt 1 120 minutes 87.5 out of 100
Score for this quiz: 87.5 out of 100
Submitted Jul 17 at 7:06am
This attempt took 120 minutes.
, Question 1
2..5 pts
Suppose X and Y are continuous random variables with joint
p.d.f.f(x,y)=6xy2,0≤x≤1,0≤y≤1. FindE[−4X−1].
Correct!
(a) -11/3
(b) -7/3
(c) -2
(d) -1/2
(e) 7/3
Question 2
2..5 pts
Suppose X and Y are discrete random variables
withE[X]=0,E[X2]=25,E[Y]=2,E[Y2]=5,andE[XY]=−1.Find the correlation
between X and Y.
(a) -0.5
Correct!
(b) -0.2
(c) -0.1
(d) 0
Instructions
This test is 120 minutes. You're allowed two cheat sheets (4 sides total). You will find tables
attached on the last page of this exam (scroll to the end). All questions are worth 2.5 points.
You’re allowed the following items:
• Pencil / pen and scratch paper.
• A reasonable calculator.
• Two cheat sheets (4 sides total).
• Tables. (Available at the end of test questions too)
Note that you are not allowed to use Arena (or any other software), even though I'm asking
questions about it.
Good luck! I want you to make this test sorry that it ever tried to mess around with you!!!
If you run into a technical issue during your exam, please contact the appropriate
provider:
Canvas: Call 1-877-259-8498 or use the
chat http://cases.canvaslms.com/liveagentchat?chattype=student (Links to an
external site.)
HonorLock: Use the chat function in the HonorLock window.
,BEFORE YOU TAKE THIS QUIZ
You will need to complete verification.
This quiz is no longer available as the course has been concluded.
Attempt History
Attempt Time Score
LATEST Attempt 1 120 minutes 87.5 out of 100
Score for this quiz: 87.5 out of 100
Submitted Jul 17 at 7:06am
This attempt took 120 minutes.
, Question 1
2..5 pts
Suppose X and Y are continuous random variables with joint
p.d.f.f(x,y)=6xy2,0≤x≤1,0≤y≤1. FindE[−4X−1].
Correct!
(a) -11/3
(b) -7/3
(c) -2
(d) -1/2
(e) 7/3
Question 2
2..5 pts
Suppose X and Y are discrete random variables
withE[X]=0,E[X2]=25,E[Y]=2,E[Y2]=5,andE[XY]=−1.Find the correlation
between X and Y.
(a) -0.5
Correct!
(b) -0.2
(c) -0.1
(d) 0
