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1. If X is a discrete random variable and 0 is not a mass point, then P(X=0)=0. A. True B. False 2. For any discrete random variable X, P (X=0)= 0.: A. True B. False 3. For a continuous random variable Y, P(Y=0) =0. A. True B. False

1. If X is a discrete random variable and 0 is not a mass point, then P(X=0)=0. A. True B. False 2. For any discrete random variable X, P (X=0)= 0.: A. True B. False 3. For a continuous random variable Y, P(Y=0) =0. A. True B. False

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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1. If X is a discrete random variable and 0 is not a mass point, then P(X=0)=0. A. True B. False 2. For any discrete random variable X, P (X=0)= 0.: A. True B. False 3. For a continuous random variable Y, P(Y=0) =0. A. True B. False 4. The random variable X = number of tweets posted in the past hour is a discrete random variable. A. True B. False 5. The number of rapid tests administered in the last three months is a continuous random variable. A. True B. False 6. If X is a continuous random variable with E(X)=5 and Var(X)=25, then P(X=5 )=0.5. A. True B. False 7. Which of the following random variables is discrete? a. W=duration of travel (in minutes) from house to school b. X = proportion of failing subjects of a student in a semester c. Y = number of business permits issued each month in Makati d. Z = weight of dog food (in kilograms) supplied by a certain pet store per month 8. Which of the following random variables is continuous? a. Z = number of food packs distributed per barangay during quarantine b. W = count of Netflix users in a household c. Y = amount of money spent during the 6.6 online sale d. X = number of Tiktok videos watched per day 9. Consider the random experiment of tossing a fair die twice. Let X be defined as the sum of the numbers in the two tosses. How many mass points does X have? a. 11 b. 36 c. 6 d. 12 10. Let X be a discrete random variable. Which of the following is NOT true? a. P(X> a) = P(X ≥ a) b. P(X> a) # P(X ≥ a) c. P(X <a) = 1 - P(X ≥ a) d. P(X> a) 1 - P(X <a) 11. Suppose you are given a 15-item multiple choice quiz with four choices each, ten of which you know the correct answer. If X is the total number of correct answers, what are the possible values of X? a. {0, 5, 10, 15} b. (10, 11, 12, 13, 14, 15) c. {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} d. {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
Transcribed Image Text:1. If X is a discrete random variable and 0 is not a mass point, then P(X=0)=0. A. True B. False 2. For any discrete random variable X, P (X=0)= 0.: A. True B. False 3. For a continuous random variable Y, P(Y=0) =0. A. True B. False 4. The random variable X = number of tweets posted in the past hour is a discrete random variable. A. True B. False 5. The number of rapid tests administered in the last three months is a continuous random variable. A. True B. False 6. If X is a continuous random variable with E(X)=5 and Var(X)=25, then P(X=5 )=0.5. A. True B. False 7. Which of the following random variables is discrete? a. W=duration of travel (in minutes) from house to school b. X = proportion of failing subjects of a student in a semester c. Y = number of business permits issued each month in Makati d. Z = weight of dog food (in kilograms) supplied by a certain pet store per month 8. Which of the following random variables is continuous? a. Z = number of food packs distributed per barangay during quarantine b. W = count of Netflix users in a household c. Y = amount of money spent during the 6.6 online sale d. X = number of Tiktok videos watched per day 9. Consider the random experiment of tossing a fair die twice. Let X be defined as the sum of the numbers in the two tosses. How many mass points does X have? a. 11 b. 36 c. 6 d. 12 10. Let X be a discrete random variable. Which of the following is NOT true? a. P(X> a) = P(X ≥ a) b. P(X> a) # P(X ≥ a) c. P(X <a) = 1 - P(X ≥ a) d. P(X> a) 1 - P(X <a) 11. Suppose you are given a 15-item multiple choice quiz with four choices each, ten of which you know the correct answer. If X is the total number of correct answers, what are the possible values of X? a. {0, 5, 10, 15} b. (10, 11, 12, 13, 14, 15) c. {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15} d. {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
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