
Probability and Statistics Concepts
Interactive Video
•
Mathematics, Education
•
10th - 12th Grade
•
Practice Problem
•
Hard
Ethan Morris
FREE Resource
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the focus of the third day of probability lessons?
Sampling distributions
Geometric distributions
Conditional probability
Random variables
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a characteristic of a discrete random variable?
The sum of its probabilities is less than one
It can take an infinite number of values
It is always normally distributed
It can only take a countable number of values
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a binomial setting, what is required for the trials?
They must be dependent
They must be independent
They must have varying probabilities of success
They must be infinite
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why can't standard deviations be added directly?
Because they are not independent
Because they are not variances
Because they are not means
Because they are always zero
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the expected value of a random variable?
The average of all possible outcomes
The most frequent outcome
The sum of all possible outcomes
The probability of the most likely outcome
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main advantage of Machine B in the photocopier problem?
Lower initial cost
Unlimited repairs
Lower expected total cost
Higher reliability
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the probability that all three ATMs are working given that at least one is working?
0.28
0.24
0.15
0.40
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