https://staugustinecollege.instructure.com/courses/3156/quizzes/9772 MATH 225 Final ExamUsername: ccienfuegosPassword: SAC80285#

Math 225 Final exam
· Due Oct 6 at 11:59pm
 
· Points 100
 
· Questions 20
 
· Time Limit 120 Minutes
Attempt History
    
    Attempt
    Time
    Score
    LATEST
    Attempt 1
    99 minutes
    100 out of 100
Score for this quiz: 100 out of 100
Submitted Oct 6 at 4:21pm
This attempt took 99 minutes.
 
Question 1
5 / 5 pts
1. Given the discrete probability distribution for x = 1, 2, 3, 4, or 5.
 
    x
    P(x) 
     
    1
    5/15
     
    2
    4/15
     
    3
    3/15
     
    4
    2/15
     
    5
    1/15
     
     
     
    
 
Find the Expected Value (mean )of a discrete probability distribution.

1.567
 
Correct!

2.333
 

1.117
 

1.247
 
 
Question 2
5 / 5 pts
1. Given the discrete probability distribution for x = 1, 2, 3, 4, or 5.
 
    x 
     P(x)
     
    1
    5/15
     
    2
    4/15
     
    3
    3/15
     
    4
    2/15
     
    5
    1/15
     
     
     
     
 
Find the standard deviation of a discrete probability distribution.

1.117
 
Correct!

1.247
 

2.333
 

1.389
 
 
Question 3
5 / 5 pts
The drug Zyban is meant to create the urge to quit smoking. In clinical trials, 35% of the study’s participants experienced insomnia when taking 300mg of Zyban per day.
In a random sample of 25 users of Zyban, find the probability that exactly 8 will experience insomnia.

0.9903
 

0.0097
 

0.8393
 
Correct!

0.1607
 
 
Question 4
5 / 5 pts
The drug Zyban is meant to create the urge to quit smoking. In clinical trials, 35% of the study’s participants experienced insomnia when taking 300mg of Zyban per day.
In a random sample of 25 users of Zyban, find the probability that fewer than 4 will experience insomnia.
Correct!

0.0097
 

0.1607
 

0.8393
 

0.0239
 
 
Question 5
5 / 5 pts
The survival rate during a risky operation for patients with no other hope of survival is 80%.  If 5 patients  have  this operation.  This event follows a binomial distribution
What is the mean number patients who survive this operation?

5
 

0.8
 

7.89
 
Correct!

4
 
 
Question 6
5 /...