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10/13/22, 1:02 AM
Second-Quiz 1: Probability and Statistics 22-23 (M,O,P)1
https://canvas.cmu.edu/courses/29902/quizzes/85270?module_item_id=5178830
1/9
Second-Quiz 1
Due
Sep 6 at 11:59pm
Points
20
Questions
20
Available
after Sep 4 at 12pm
Time Limit
90 Minutes
Instructions
Attempt History
Attempt
Time
Score
LATEST
Attempt 1 31 minutes
19 out of 20
Score for this quiz: 19
out of 20
Submitted Sep 6 at 10:07pm
This attempt took 31 minutes.
The questions in this quiz are based on the moderate and challenging questions in HW1, as well as
general concepts covered in Module 1.
Please select the answer closest to what you believe to be the correct answer in multiple choice
questions.
The quiz consists of 20 multiple-choice questions. Make sure you have a reliable internet connection
during the duration of the quiz.
1 / 1 pts
Question 1
In 1.2 which of the following basic outcomes is NOT part of the event "X
wins the election"? Each letter in a basic outcome refers to candidate X
winning the corresponding swing state; candidate X looses the swing
states not listed.
FP FW
10/13/22, 1:02 AM
Second-Quiz 1: Probability and Statistics 22-23 (M,O,P)1
https://canvas.cmu.edu/courses/29902/quizzes/85270?module_item_id=5178830
2/9
MW Correct!
Correct!
PMW 1 / 1 pts
Question 2
In 1.3 what is the probability that candidate X wins the elections?
0.25 0.4375 0.5 Correct!
Correct!
0.625 1 / 1 pts
Question 3
In 1.4 what is the probability that candidate X will win the presidential
elections?
0.518 0.607 0.698 0.72 Correct!
Correct!
10/13/22, 1:02 AM
Second-Quiz 1: Probability and Statistics 22-23 (M,O,P)1
https://canvas.cmu.edu/courses/29902/quizzes/85270?module_item_id=5178830
3/9
1 / 1 pts
Question 4
In 2.4, what is the probability that both Beth and her luggage make it to
Pittsburgh on her scheduled flight?
0.9 0.59 Correct!
Correct!
0.56 0.21 1 / 1 pts
Question 5
In 2.5, the events = "Beth's flight from Miami arrives ON TIME in
Atlanta" and = "Beth makes the connection and her LUGGAGE is there
at her arrival in Pittsburgh" are statistically independent.
True False Correct!
Correct!
1 / 1 pts
Question 6
In 2.6, given that Beth made her connection in Atlanta, what is the
probability that her luggage is there at her arrival in Pittsburgh?
0.72 Correct!
Correct!
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10/13/22, 1:02 AM
Second-Quiz 1: Probability and Statistics 22-23 (M,O,P)1
https://canvas.cmu.edu/courses/29902/quizzes/85270?module_item_id=5178830
4/9
0.68 0.59 0.375 1 / 1 pts
Question 7
In 2.7, given that Beth made it to Pittsburgh on her scheduled flight and
her luggage was not there at her arrival, what is the probability that Beth's
flight from Miami was delayed arriving in Atlanta?
0.13 0.23 0.391 Correct!
Correct!
0.521 1 / 1 pts
Question 8
In 3.2, what is the inventory needed at the Harrisburg warehouse?
158 192 196 Correct!
Correct!
220
10/13/22, 1:02 AM
Second-Quiz 1: Probability and Statistics 22-23 (M,O,P)1
https://canvas.cmu.edu/courses/29902/quizzes/85270?module_item_id=5178830
5/9
1 / 1 pts
Question 9
In 3.2, what is the decrease in inventory achieved by switching to a single
warehouse in Harrisburg as compared to (3.1)?
0 24 Correct!
Correct!
28 62 1 / 1 pts
Question 10
In 4.3, what is the variance of ?
0 Correct!
Correct!
2.5 5 6.25 1 / 1 pts
Question 11
In 4.4, what is the correlation between and ?
10/13/22, 1:02 AM
Second-Quiz 1: Probability and Statistics 22-23 (M,O,P)1
https://canvas.cmu.edu/courses/29902/quizzes/85270?module_item_id=5178830
6/9
-1 Correct!
Correct!
0 1 2 1 / 1 pts
Question 12
In 4.4, and are independent random variables.
True False Correct!
Correct!
1 / 1 pts
Question 13
In 4.5, what is the variance of ?
7.5 12.5 17.5 22.5 Correct!
Correct!
1 / 1 pts
Question 14
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10/13/22, 1:02 AM
Second-Quiz 1: Probability and Statistics 22-23 (M,O,P)1
https://canvas.cmu.edu/courses/29902/quizzes/85270?module_item_id=5178830
7/9
In 5.3, how many tickets should the airline sell on this 100-seat plane?
111 109 Correct!
Correct!
108 102 1 / 1 pts
Question 15
In 6.4, what is Moonbucks' expected revenue between 9AM and 10AM?
152 107.7 100 Correct!
Correct!
85 1 / 1 pts
Question 16
In 6.5, what is the probability that Moonbucks sells 35 coffees or more (all
three types combined) between 9AM and 10AM?
0.351 0.649
10/13/22, 1:02 AM
Second-Quiz 1: Probability and Statistics 22-23 (M,O,P)1
https://canvas.cmu.edu/courses/29902/quizzes/85270?module_item_id=5178830
8/9
0.709 Correct!
Correct!
0.895 1 / 1 pts
Question 17
Given two random variables , if , then .
True False Correct!
Correct!
1 / 1 pts
Question 18
are two Poisson random variables.
If , then .
True Correct!
Correct!
False 1 / 1 pts
Question 19
Let be two events with
.
10/13/22, 1:02 AM
Second-Quiz 1: Probability and Statistics 22-23 (M,O,P)1
https://canvas.cmu.edu/courses/29902/quizzes/85270?module_item_id=5178830
9/9
If , then .
True Correct!
Correct!
False 0 / 1 pts
Question 20
Given two random variables , if , then are independent.
True ou Answered
ou Answered
False orrect Answer
orrect Answer
Quiz Score: 19
out of 20
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smallest measurement in the data set) were
replaced by 24. Which measures of central
tendency would be affected by the change?
Median
OMode
None of these meASures.
Choose all that apply.
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