Module 1: Random Variables and Probability Distributions Flashcards
-is a result of a chance event, that you can measure or count.
Random Variable
-is a numerical quantity that is assigned to the outcome of an experiment. It is a variable that assumes numerical values associated with the events of an experiment.
Random Variable
-is a quantitative variable which values depends on change.
Random Variable
We use ______ _________ to represent a random variable.
capital letters
A random variable may be classified as ______ and ___________.
discrete & continuous
A _______ random variable has a countable number of possible values.
discrete
A __________ random variable can assume an infinite number of values in one or more intervals.
continuous
If two coins are tossed once, which is NOT a possible value of the random variable for the number of
heads?
A. 0
B. 1
C. 2
D. 3
D. 3
Which of the following is a discrete random variable?
A. Length of wire ropes
B. Number of soldiers in the troop
C. Amount of paint used in repainting the building
D. Voltage of car batteries
B. Number of soldiers in the troop
How many ways are there in tossing two coins once?
A. 4
B. 3
C. 2
D. 1
A. 4
It is a numerical quantity that is assigned to the outcome of an experiment.
A. random variable
B. variable
C. probability
D. probability distribution
A. random variable
Discrete or Continuous:
The weight of the professional wrestlers
Continuous
Discrete or Continuous:
The number of winners in lotto for each day
Discrete
Discrete or Continuous:
The area of lots in an exclusive subdivision
Continuous
Discrete or Continuous:
The speed of a car
Continuous
Discrete or Continuous:
The number of dropouts in a school per district
Discrete
Determine the values of the random variables:
Two coins are tossed. Let T be the number of tails that occur. Determine the values of the random variable T.
0, 1, 2
Determine the values of the random variables:
A meeting of envoys was attended by 4 Koreans and 2 Filipinos. If three envoys were selected at random one after the other, determine the values of the random variable F representing the number of Filipinos.
0, 1, 2
