Main content

# Unit: Exploring one-variable quantitative data: Percentiles, z-scores, and the normal distribution

AP Stats:

UNC (BI)

, UNC‑1 (EU)

, VAR (BI)

, VAR‑2 (EU)

Not feeling ready for this? Check out Get ready for AP® Statistics.

#### 0

### About this unit

This unit takes our understanding of distributions to the next level. We'll measure the position of data within a distribution using percentiles and z-scores, we'll learn what happens when we transform data, we'll study how to model distributions with density curves, and we'll look at one of the most important families of distributions called Normal distributions.AP Stats:

UNC (BI)

, UNC‑1 (EU)

, UNC‑1.G (LO)

, UNC‑1.G.4 (EK)

, UNC‑1.I (LO)

, UNC‑1.I.5 (EK)

### Learn

### Practice

- Calculate percentilesGet 3 of 4 questions to level up!

AP Stats:

VAR (BI)

, VAR‑2 (EU)

, VAR‑2.B (LO)

, VAR‑2.B.1 (EK)

, VAR‑2.B.2 (EK)

, VAR‑2.C (LO)

, VAR‑2.C.1 (EK)

### Learn

### Practice

- Calculating z-scoresGet 3 of 4 questions to level up!
- Comparing with z-scoresGet 3 of 4 questions to level up!

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

AP Stats:

UNC (BI)

, UNC‑1.F (LO)

, UNC‑1.F.2 (EK)

, UNC‑1.M (LO)

, UNC‑1.M.2 (EK)

, VAR‑6.A.1 (EK)

AP Stats:

VAR (BI)

, VAR‑2 (EU)

, VAR‑2.A (LO)

, VAR‑2.A.2 (EK)

, VAR‑2.A.3 (EK)

, VAR‑2.A.4 (EK)

### Learn

### Practice

- Empirical ruleGet 3 of 4 questions to level up!

AP Stats:

VAR (BI)

, VAR‑2 (EU)

, VAR‑2.B (LO)

, VAR‑2.B.3 (EK)

, VAR‑2.B.4 (EK)

### Learn

### Practice

- Normal distribution: Area above or below a pointGet 3 of 4 questions to level up!
- Normal distribution: Area between two pointsGet 3 of 4 questions to level up!
- Normal calculations in reverseGet 3 of 4 questions to level up!

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

Up next for you:

Level up on all the skills in this unit and collect up to 700 Mastery points!#### Unit test

AP® is a registered trademark of the College Board, which has not reviewed this resource.