Log in Sign up for FREE

AP Stats 3.1 Quiz

Last updated about 5 years ago

10 questions

Note from the author:

The Practice of Statistics, 4th Edition, 3.1 Quiz

3

Select ALL that apply. You can describe the overall pattern of a scatterplot by the…

1

What does correlation measure?

1

correlation is NON-resistant to extreme observations

Below is a scatterplot relating systolic blood pressure and age for 14 men from 42 to 67 years old.  Use the scatterplot to answer questions #4-10.

1

Is there a clear explanatory variable and response variable in this setting?

2

Does the scatterplot show an association? If so, explain the association.

1

What is the form of the relationship?

1

Which of the following is closest to the correlation between systolic blood pressure and age for this group of 14 men? Explain your reasoning where it says "Show your work"

1

There is one “unusual point” on the graph. Explain what is “unusual” about this subject.

1

What effect would removing the “unusual point” have on the correlation?

1

Suppose we rescaled the ages so that they were expressed as number of years above (+) or below (–) 50 years old. That is, suppose we subtract 50 from each value. How would the correlation change? Explain