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Unit: Random variables
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About this unit
Random variables can be any outcomes from some chance process, like how many heads will occur in a series of 20 flips of a coin. We calculate probabilities of random variables and calculate expected value for different types of random variables.Learn
Practice
- Constructing probability distributionsGet 3 of 4 questions to level up!
- Probability modelsGet 5 of 7 questions to level up!
- Probability with discrete random variablesGet 3 of 4 questions to level up!
- Expected valueGet 5 of 7 questions to level up!
- Mean (expected value) of a discrete random variableGet 3 of 4 questions to level up!
- Standard deviation of a discrete random variableGet 3 of 4 questions to level up!
Practice
- Probability in density curvesGet 3 of 4 questions to level up!
- Probability in normal density curvesGet 3 of 4 questions to level up!
Learn
Practice
- Combining random variablesGet 3 of 4 questions to level up!
- Combining normal random variablesGet 3 of 4 questions to level up!
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Practice
- Identifying binomial variablesGet 3 of 4 questions to level up!
- Binomial probability formulaGet 3 of 4 questions to level up!
- Calculating binomial probabilityGet 3 of 4 questions to level up!
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Practice
- Mean and standard deviation of a binomial random variableGet 3 of 4 questions to level up!
Learn
Practice
- Binomial vs. geometric random variablesGet 3 of 4 questions to level up!
- Geometric probabilityGet 3 of 4 questions to level up!
- Cumulative geometric probabilityGet 3 of 4 questions to level up!
Learn
Practice
- Expected value with empirical probabilitiesGet 3 of 4 questions to level up!
- Expected value with calculated probabilitiesGet 3 of 4 questions to level up!
- Making decisions with expected valuesGet 3 of 4 questions to level up!
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