3.2

Question 1

What is bivarate data?

Answer 1

Data collected on 2 variables from the same set of observations.

Question 2

What are explanatory variables?

Answer 2

This is the independent variable or x-variable.

Question 3

What are response variables?

Answer 3

This is the dependent variable or y-variable.

Question 4

When do you use a scatterplot?

Answer 4

This is used when you have 2 variables and you are trying to determine the relationship between the 2.

Question 5

What is correlation?

Answer 5

This is the measure of the direction and strength of a linear relationship between x and y.

Question 6

What is the coefficient of determination?

Answer 6

This is the proportion of the total sample variation in the response that can be explained by a linear relationship.

Question 7

What is linear regression?

Answer 7

This technique allows you to summarize the data and predict what will happen in the future as well.

Question 8

What is residual?

Answer 8

This is the error term that accounts for the lack of accuracy from the line of regression.