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# Unit: Random variables and probability distributions

AP Stats:
UNC (BI)
,
UNC‑3 (EU)
,
VAR (BI)
,
VAR‑5 (EU)
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#### 0

Possible mastery points

### About this unit

A random variable is some outcome from a chance process, like how many heads will occur in a series of 20 flips, or how many seconds it took someone to read this sentence. Calculate probabilities and expected value of random variables, and look at ways to ransform and combine random variables.

## Introduction to random variables and probability distributions

AP Stats:
VAR (BI)
,
VAR‑5 (EU)
,
VAR‑5.A (LO)
,
VAR‑5.A.1 (EK)
,
VAR‑5.A.2 (EK)
,
VAR‑5.A.3 (EK)
,
VAR‑5.C (LO)
,
VAR‑5.C.1 (EK)
,
VAR‑5.C.2 (EK)
,
VAR‑5.C.3 (EK)
,
VAR‑5.D (LO)
,
VAR‑5.D.1 (EK)

### Practice

#### Quiz 1

Level up on the above skills and collect up to 240 Mastery points

## Mean and standard deviation of random variables

### Practice

#### Quiz 2

Level up on the above skills and collect up to 240 Mastery points

AP Stats:
VAR (BI)
,
VAR‑5 (EU)
,
VAR‑5.F (LO)
,
VAR‑5.F.1 (EK)

## Combining random variables

AP Stats:
VAR (BI)
,
VAR‑5 (EU)
,
VAR‑5.E (LO)
,
VAR‑5.E.1 (EK)
,
VAR‑5.E.2 (EK)
,
VAR‑5.E.3 (EK)

#### Quiz 3

Level up on the above skills and collect up to 240 Mastery points

AP Stats:
UNC (BI)
,
UNC‑3 (EU)
,
UNC‑3.A (LO)
,
UNC‑3.A.2 (EK)
,
UNC‑3.B (LO)
,
UNC‑3.B.1 (EK)

## Parameters for a binomial distribution

AP Stats:
UNC (BI)
,
UNC‑3 (EU)
,
UNC‑3.A (LO)
,
UNC‑3.A.2 (EK)
,
UNC‑3.B (LO)
,
UNC‑3.B.1 (EK)
,
UNC‑3.C (LO)
,
UNC‑3.C.1 (EK)

### Practice

#### Quiz 4

Level up on the above skills and collect up to 320 Mastery points

## The geometric distribution

AP Stats:
UNC (BI)
,
UNC‑3 (EU)
,
UNC‑3.E (LO)
,
UNC‑3.E.1 (EK)
,
UNC‑3.E.2 (EK)
,
UNC‑3.F (LO)
,
UNC‑3.F.1 (EK)

### Practice

#### Quiz 5

Level up on the above skills and collect up to 320 Mastery points
Up next for you:

#### Unit test

Level up on all the skills in this unit and collect up to 1700 Mastery points!
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