
Discrete random variable
Quiz
•
Mathematics
•
12th Grade
•
Practice Problem
•
Medium
Lim Hui
Used 4+ times
FREE Resource
Enhance your content in a minute
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which is NOT a discrete random variable?
Number of heads obtained when a coin is being thrown 3 times.
Height of students in a class.
Number of '6's obtained when 4 dice are thrown.
Score of students in a common test.
Answer explanation
If the outcomes of your variables are not continuous, e.g. integers, it is a discrete random variable.
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The following is the probability distribution table of X.
What is the probability of P(X<3)?
1/8
1/2
7/8
1
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
If X~B(10,p), how do we calculate P(X > 2)?
Binomcdf(10,p,2)
1-binompdf(10,p,2)
1-binomcdf(10,p,2)
1-binomcdf(10,p,1)
Answer explanation
P(X>2) = 1 - (PX<=2), so you need to use 1- binomial cumulative probability 2.
4.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
What are the traits of a binomial distribution? Tick all which are applicable.
There are unlimited number of trials that is conducted.
There is a limited number of trials.
Probability of success is constant.
There are only 2 possible outcomes
5.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
Which of the following scenarios belong to a binomial distribution? Click those that are correct.
Number of heads obtained when a coin is being thrown 3 times.
Height of students in a class.
Number of '6's obtained when 4 dice are thrown.
Score of students in a common test.
Answer explanation
Only the first is correct. You need to check the 3 traits: (1) 2 outcomes - success / failure (2) constant probability of success (3) n independent trials.
The number of '6's does not meet (1) & (2). Heights are continuous random variable. Scores does not meet the conditions too.
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which of the following statements best describe the expected value of a discrete random variable?
It is the average of all possible outcomes.
It is the weighted average of all possible outcomes.
It is the geometric average of all possible outcomes
It is the complex average of all possible outcomes in the distribution.
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
How would you interpret a very small variance or standard deviation but not equal to 0?
The values of the random variables are farther from the mean.
The values of the random variables are nearer to the mean.
The values of the random variables are equal to the mean.
The values of the random variables have no relationship with the mean.
Access all questions and much more by creating a free account
Create resources
Host any resource
Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever
or continue with

Microsoft
%20(1).png)
Apple
Others
Already have an account?
Similar Resources on Wayground
12 questions
surface area and volume of prisms
Quiz
•
8th - 12th Grade
12 questions
Algebra I 8/16 Quiz
Quiz
•
9th - 12th Grade
15 questions
Límites indeterminados
Quiz
•
11th - 12th Grade
10 questions
LIMITS AND CONTINUITY
Quiz
•
12th Grade
10 questions
Side – Angle Inequality Theorem
Quiz
•
8th - 12th Grade
10 questions
de Moivre's Theorem
Quiz
•
12th Grade - University
10 questions
ÁLGEBRA | NUM. Y OPER.
Quiz
•
12th Grade
10 questions
Mengenal Bentuk Aljabar
Quiz
•
7th Grade - University
Popular Resources on Wayground
15 questions
Fractions on a Number Line
Quiz
•
3rd Grade
20 questions
Equivalent Fractions
Quiz
•
3rd Grade
25 questions
Multiplication Facts
Quiz
•
5th Grade
22 questions
fractions
Quiz
•
3rd Grade
20 questions
Main Idea and Details
Quiz
•
5th Grade
20 questions
Context Clues
Quiz
•
6th Grade
15 questions
Equivalent Fractions
Quiz
•
4th Grade
20 questions
Figurative Language Review
Quiz
•
6th Grade
Discover more resources for Mathematics
12 questions
Add and Subtract Polynomials
Quiz
•
9th - 12th Grade
13 questions
Model Exponential Growth and Decay Scenarios
Quiz
•
9th - 12th Grade
27 questions
7.2.3 Quadrilateral Properties
Quiz
•
9th - 12th Grade
10 questions
Key Features of Quadratic Functions
Interactive video
•
8th - 12th Grade
11 questions
Exponent Quotient Rules A1 U7
Quiz
•
9th - 12th Grade
18 questions
Integer Operations
Quiz
•
5th - 12th Grade
15 questions
Exponential Growth and Decay Word Problems
Quiz
•
9th - 12th Grade
10 questions
complementary and Supplementary angles
Quiz
•
9th - 12th Grade
