Random Variables Quiz

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Test your knowledge of random variables.

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Mary Joy C. Pelayo

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Froggy Jumps Random Variables QuizVersión en línea Test your knowledge of random variables. por Mary Joy C. Pelayo 1 What is a random variable? a A probability distribution over events b A function mapping outcomes to numerical values c A fixed constant value 2 Discrete random variable a Takes any real value b Has no probability distribution c Takes countable values with probabilities 3 Probability mass function (PMF) describes a a Continuous variable's density b Expected value only c Discrete random variable's probability for each value 4 Continuous random variable is characterized by a Probability mass function b Uniform distribution only c Probability density function (PDF) 5 Expected value is best described as a Maximum possible value b Long-run average of the variable c Median of all outcomes 6 Variance measures a Spread of a random variable around its mean b Central tendency c Probability of the mean 7 Two random variables are independent if a They have the same mean b One variable's value gives no information about the other c They are identically distributed 8 Moment of a random variable a Median of the distribution b Probability of an event c Expected value of its power 9 Law of total expectation applies when a Variables are identically distributed b Variables are independent c Conditioning on a partition of events 10 Variance of a constant is a Undefined b One c Zero

Froggy Jumps

Random Variables QuizVersión en línea

Test your knowledge of random variables.

por Mary Joy C. Pelayo

What is a random variable?

A probability distribution over events

A function mapping outcomes to numerical values

A fixed constant value

Discrete random variable

Takes any real value

Has no probability distribution

Takes countable values with probabilities

Probability mass function (PMF) describes a

Continuous variable's density

Expected value only

Discrete random variable's probability for each value

Continuous random variable is characterized by

Probability mass function

Uniform distribution only

Probability density function (PDF)

Expected value is best described as

Maximum possible value

Long-run average of the variable

Median of all outcomes

Variance measures

Spread of a random variable around its mean

Central tendency

Probability of the mean

Two random variables are independent if

They have the same mean

One variable's value gives no information about the other

They are identically distributed

Moment of a random variable

Median of the distribution

Probability of an event

Expected value of its power

Law of total expectation applies when

Variables are identically distributed

Variables are independent

Conditioning on a partition of events

Variance of a constant is

Undefined

One

Zero

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Random Variables Quiz

Froggy Jumps

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Creada por

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Froggy Jumps

Random Variables QuizVersión en línea

por Mary Joy C. Pelayo

What is a random variable?

Discrete random variable

Probability mass function (PMF) describes a

Continuous random variable is characterized by

Expected value is best described as

Variance measures

Two random variables are independent if

Moment of a random variable

Law of total expectation applies when

Variance of a constant is

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