Probability assignment quiz
 Question 1
0.5 out of 0.5 points
Consider the following discrete probability distribution. What is the probability that X is negative?
Answer 


 Question 2
0 out of 0.5 points
It is known that 10% of the calculators shipped from a particular factory are defective and the data follows a binomial distribution. What is the probability that exactly three of five chosen calculators are defective? Answer 


 Question 3
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The weight of football players is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds. The probability of a player weighing more than 241.25 pounds is Answer 


 Question 4
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The assembly time for a product is uniformly distributed between 6 to 10 minutes, the probability of assembling the product in 7 minutes or more is Answer 


 Question 5
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Three workers at a fast food restaurant pack the takeout chicken dinners. John packs 45% of the dinners, Mary packs 25% of the dinners and Sue packs the remaining dinners. Of the dinners John packs 4% do not include a salt packet. If Mary packs the dinner 2% of the time the salt is omitted. Lastly, 3% of the dinners do not include salt if Sue does the packing. What is the probability that you will have salt packed with your dinner? Answer 


 Question 6
0.5 out of 0.5 points
If A and B are independent events with P(A) = 0.65 and P(A ∩ B) = 0.26, then, P(B) = Answer 


 Question 7
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The following data show the number of hours worked by 200 statistics students.
Answer 


 Question 8
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As a company manager for the Quick Money Business there is a 0.40 probability that you will be promoted this year. There is a 0.72 probability that you will get a promotion or a raise. The probability of getting a promotion and a raise is 0.25. What is the probability of getting a raise? Answer 


 Question 1
0.5 out of 0.5 points
If A and B are independent events with P(A) = 0.05 and P(B) = 0.65, then P(AB) = Answer 


 Question 2
0.5 out of 0.5 points
A recent survey shows that the probability of a college student drinking alcohol is 0.6. Answer 


 Question 3
0.5 out of 0.5 points
Alison has all her money invested in two mutual funds, A and B. She knows that there is a 40% chance that fund A will rise in price. Answer 


 Question 4
0.5 out of 0.5 points
As a company manager for the Quick Money Business there is a 0.40 probability that you will be promoted this year. There is a 0.72 probability that you will get a promotion or a raise. The probability of getting a promotion and a raise is 0.25. What is the probability of getting a raise? Answer 


 Question 5
0.5 out of 0.5 points
X is a normally distributed random variable with a mean of 22 and a standard deviation of 5. The probability that X is between 17 and 22 is Answer 


 Question 6
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X is a normally distributed random variable with a mean of 22 and a standard deviation of 5. The probability that X is more than 9.7 is Answer 


 Question 7
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Thirty percent of the CFA candidates have a degree in economics. A random sample of three CFA candidates is selected. What is the probability that at least one of them has a degree in economics? Answer 


 Question 8
0.5 out of 0.5 points
Which of the following can be represented by a discrete random variable? Answer 


 Question 3
0.5 out of 0.5 points
Mutually exclusive and collectively exhaustive events contain all outcomes of a sample space, and they do not share any common outcomes. Answer 


 Question 4
0.5 out of 0.5 points
If A and B are independent events with P(A) = 0.05 and P(B) = 0.65, then P(AB) = Answer 


 Question 5
0.5 out of 0.5 points
An experiment consists of four outcomes with P(E_{1}) = 0.2, P(E_{2}) = 0.3, and P(E_{3}) = 0.4. The probability of outcome E_{4} is Answer 


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