Statistics Chapters 4-5 Flashcards Preview

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Flashcards in Statistics Chapters 4-5 Deck (10)
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1
Q

What is bivariate data?

A

Data which has pairs of values for two variables

2
Q

What is correlation?

A

The nature of the linear relationship between two variables

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

4
Q

What is the regression line?

A

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

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

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)

7
Q

What is a Venn diagram used for?

A

Representing events graphically using probabilities or frequencies

8
Q

What is true for mutually exclusive events?

A

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

9
Q

What is true for independent events?

A

P(AΠB) = P(A) x P(B)

10
Q

What does a tree diagram show?

A

The outcomes of two or more events happening in succession