4. The random variable X = number of tweets posted in the past hour is a discrete randon variable. A. True B. False 5. The number of rapid tests administered in the last three months is a continuous randon 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
4. The random variable X = number of tweets posted in the past hour is a discrete randon variable. A. True B. False 5. The number of rapid tests administered in the last three months is a continuous randon 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
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Please answer quickly
Transcribed Image Text: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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