Statistics Chapters 4-5 Flashcards

1
Q

What is bivariate data?

A

Data which has pairs of values for two variables

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is correlation?

A

The nature of the linear relationship between two variables

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How can you determine if two correlated pieces of data have a causal relationship?

A

Use the context from the question and common sense

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the regression line?

A

A line of best fit showing the change of one variable in relationship to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How is the regression line of y on x written?

A

y = a + bx

b: change in y for each unit change in x

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

When can a regression line be used to make predictions? (2)

A

For the value of the dependent variable (not independent)

Within the range of the data (never extrapolate)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a Venn diagram used for?

A

Representing events graphically using probabilities or frequencies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is true for mutually exclusive events?

A

P(AUB) = P(A) + P(B)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is true for independent events?

A

P(AΠB) = P(A) x P(B)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does a tree diagram show?

A

The outcomes of two or more events happening in succession

How well did you know this?
1
Not at all
2
3
4
5
Perfectly