Module 10 Relationships Between Variables

We wish to investigate the relationship between the number seeds planted in a garden and the number of fruit grown. The explanatory variable (EV) is

• The number of fruit grown

• The amount of soil in the garden

• The number of hours spent watering the plants

• The number of seeds planted

We wish to investigate the relationship between the time spent shopping and the number of items bought. The response variable (RV) is

• The number of items bought

• The number of items at the shop

• The time spent shopping

• The time spent getting to the shops

Estimate the value of r:

• -0.7

• 0.35

• 0.98

• 0.65

Estimate the value of r:

• 0.83

• 0.10

• -0.75

• 0.52

Estimate the value of r:

• 0.03

• -0.99

• 0.79

• -0.72

Estimate the value of r:

• 0.99

• 0.05

• -0.99

• 0.78

The scatterplot shows the airspeed (in km/h) and the number of seats, of 16 commercial aircraft. Which of the following statements best matches the scatterplot?

• There is no relationship between the airspeed of an aircraft and the number of seats.

• There is a strong negative linear relationship between the airspeed of an aircraft and the number of seats.

• There is a strong positive non-linear relationship between the airspeed of an aircraft and the number of seats.

• There is a strong positive linear relationship between the airspeed of an aircraft and the number of seats.

How would you describe this association?

• Strong positive linear

• Weak positive linear

• Moderate positive linear

• No association

Which axis on a scatterplot is used to display the EV?

• x-axis

• y-axis

Which axis on a scatterplot is used to display the RV?

• x-axis

• y-axis