# ap stats - unit 2

Studied by 8 people
0.0(0)
Get a hint
Hint

explanatory variable

1 / 19

# Earn XP

## Description and Tags

### 20 Terms

1

explanatory variable

independent variable; x-axis

New cards
2

response variable

dependent variable; y-axis

New cards
3

correlation coefficient (r)

measures the strength of a linear relationship

New cards
4

r interpretation

There is a (strength), (direction) linear relationship between (variable) and (variable).

New cards
5

lurking variable

â€śbehind the scenesâ€ť variable that affects association

New cards
6

LSRL

line that minimizes distance of data points to the line

New cards
7

LSRL equation

y^= a + bx

New cards
8

slope interpretation

For every increase in one (x-context), the model predicts an/a (increase/decrease) of about (slope) in (y-context).

New cards
9

y-int interpretation

When (x=0 context) the predicted value of (y-context) is about (y-int).

New cards
10

residual formula

residual = actual - predicted

New cards
11

residual interpretation

The actual (y-context) was (residual) (above/below) the predicted value for (x-context).

New cards
12

interpolation

predictions made within the range of data

New cards
13

extrapolation

predictions made outside of the data range (unreliable)

New cards
14

s

standard deviation of residuals (typical error)

New cards
15

s interpretation

The actual (y-context) is typically about (S) away from the number predicted by the LSRL.

New cards
16

RÂ˛

% improvement in error given an explanatory variable

New cards
17

RÂ˛ interpretation

About (RÂ˛)% of the variability in (y-context) can be explained by the variability in (x-context).

New cards
18

outliers

do not follow linear pattern and have a large residual

New cards
19

high leverage points

substantially larger/smaller x-value than the rest of the data

New cards
20

influential points

any point that will change the LSRL substantially if removed

New cards

## Explore top notes

Note
Studied by 9405 people
Updated ... ago
4.8 Stars(96)
Note
Studied by 13 people
Updated ... ago
5.0 Stars(1)
Note
Studied by 57 people
Updated ... ago
5.0 Stars(1)
Note
Studied by 13 people
Updated ... ago
5.0 Stars(1)
Note
Studied by 1 person
Updated ... ago
5.0 Stars(1)
Note
Studied by 23 people
Updated ... ago
5.0 Stars(1)
Note
Studied by 6 people
Updated ... ago
5.0 Stars(1)
Note
Studied by 12 people
Updated ... ago
5.0 Stars(1)

## Explore top flashcards

Flashcard30 terms
Studied by 1 person
Updated ... ago
5.0 Stars(1)
Flashcard22 terms
Studied by 4 people
Updated ... ago
5.0 Stars(1)
Flashcard165 terms
Studied by 10 people
Updated ... ago
5.0 Stars(1)
Flashcard50 terms
Studied by 6 people
Updated ... ago
4.0 Stars(1)
Flashcard107 terms
Studied by 23 people
Updated ... ago
5.0 Stars(1)
Flashcard91 terms
Studied by 4 people
Updated ... ago
5.0 Stars(1)
Flashcard63 terms
Studied by 32 people
Updated ... ago
5.0 Stars(1)
Flashcard30 terms
Studied by 4 people
Updated ... ago
5.0 Stars(1)