If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

# Unit: Exploring two-variable quantitative data

AP Stats:
DAT (BI)
,
DAT‑1 (EU)
,
UNC (BI)
,
UNC‑1 (EU)
Not feeling ready for this? Check out Get ready for AP® Statistics.

#### 0

Possible mastery points

### About this unit

We use scatter plots to explore the relationship between two quantitative variables, and we use regression to model the relationship and make predictions. This unit explores linear regression and how to assess the strength of linear models.

## Representing the relationship between two quantitative variables

AP Stats:
DAT (BI)
,
DAT‑1 (EU)
,
DAT‑1.A (LO)
,
DAT‑1.A.1 (EK)
,
DAT‑1.A.2 (EK)
,
DAT‑1.A.3 (EK)
,
DAT‑1.A.4 (EK)
,
DAT‑1.A.5 (EK)
,
DAT‑1.A.6 (EK)
,
UNC (BI)
,
UNC‑1 (EU)
,
UNC‑1.S (LO)
,
UNC‑1.S.1 (EK)
,
UNC‑1.S.2 (EK)
,
UNC‑1.S.3 (EK)

### Practice

#### Quiz 1

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

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

## Residuals

### Practice

#### Quiz 2

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

## Least-squares regression

AP Stats:
DAT (BI)
,
DAT‑1 (EU)
,
DAT‑1.D (LO)
,
DAT‑1.D.1 (EK)
,
DAT‑1.D.2 (EK)
,
DAT‑1.E (LO)
,
DAT‑1.E.1 (EK)
,
DAT‑1.G (LO)
,
DAT‑1.G.1 (EK)
,
DAT‑1.G.2 (EK)
,
DAT‑1.G.3 (EK)
,
DAT‑1.H (LO)
,
DAT‑1.H.1 (EK)
,
DAT‑1.H.2 (EK)
,
DAT‑1.H.3 (EK)

### Practice

#### Quiz 3

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

## Analyzing departures from linearity

AP Stats:
DAT (BI)
,
DAT‑1 (EU)
,
DAT‑1.E (LO)
,
DAT‑1.E.2 (EK)
,
DAT‑1.F (LO)
,
DAT‑1.F.1 (EK)
,
DAT‑1.F.2 (EK)
,
DAT‑1.G (LO)
,
DAT‑1.G.4 (EK)
,
DAT‑1.I (LO)
,
DAT‑1.I.1 (EK)
,
DAT‑1.I.2 (EK)
,
DAT‑1.I.3 (EK)

### Practice

#### Quiz 4

Level up on the above skills and collect up to 240 Mastery points
Up next for you:

#### Unit test

Level up on all the skills in this unit and collect up to 1300 Mastery points!
AP® is a registered trademark of the College Board, which has not reviewed this resource.