Bivariate Data Associations

Which scatter plot(s) could be used to show the relationship between a person's age and a person's height?

• 3

• 4

• 5

• 6

Which scatter plot(s) could be used to show the relationship between a person's age and the number of syllables in a person's first and last name?

• 3

• 4

• 5

• 6

If a straight line can be drawn to follow the overall trend of a scatter plot, it is _.

• linear

• strong

• weak

• nonlinear

Which would NOT likely be the variables represented on the scatter plot.

• The number of miles driven and the gallons of gas used.

• The number of students in a school and the number of unused lockers

• the number items ordered at a restaurant and the cost of the bill

• the number of customers in a store and the length of the wait at the register

Ms. Glenn's class did a survey about the number of chores students did and the amount of allowance that student earned. Bryan thinks the association is negative because they found that as the number of chores decreased, the amount of allowance also decreased. Is Bryan correct?

• Bryan is correct. The variables decreased so the association is negative.

• Bryan is incorrect. The variables have no effect on each other.

• Bryan is correct. The variables move in opposite directions.

• Bryan is incorrect. if the variables move together, then the association is positive.

Which scatter plot has a stronger association? How do you know?

• Scatter Plot A

  points are close together

• Scatter Plot B

  points are more linear

Which scatter plot appears to be linear

• Scatter Plot A

• Scatter Plot B

What is the correlation between length of running start and distance of jump?

• positive:  the further you run the further you jump

• negative: the less you run the less distance of your jump

• positive: the further your running start the less your distance

If the gradient of the line is positive (i.e. going up from left to right), then the association is said to be:

• Negative

• Positive

• Non-existent

• infinite

If the gradient of the line is negative (i.e. going down from left to right) then the association is said to be:

• Negative

• Positive

• Non-existent

• Infinite