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# Unit: Random variables

#### 0

### 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!

### Learn

### 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!

### Learn

### 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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Level up on all the skills in this unit and collect up to 2100 Mastery points!