What is a random variable in the context of probability?
Probability Statistics - The Foundations of Machine Learning - Quantifying Events - Random Variables

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Mathematics
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9th - 10th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A variable that maps outcomes to numeric values
A variable that is only used in programming
A variable that always changes
A constant value
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does a mathematical variable differ from a programming variable?
Mathematical variables are assigned once and do not change, programming variables can change
There is no difference between the two
Programming variables are constants, mathematical variables are not
Mathematical variables can change, programming variables cannot
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is true about random variables?
They can only take integer values
They have a probability associated with each possible value
They are always constant
They are only used in computer science
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the probability of each outcome when rolling a fair six-sided die?
1/6
1/3
1/12
1/2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a probability distribution?
A method to calculate averages
A way to distribute probabilities among different outcomes
A list of all possible outcomes
A type of random variable
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a frequency distribution?
A distribution of probabilities
A type of random variable
A table showing the frequency of different outcomes
A method to calculate probabilities
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you convert a frequency distribution into a probability distribution?
By multiplying each frequency by 100
By dividing each frequency by the total number of observations
By subtracting each frequency from the total
By adding all frequencies together
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